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The computer does not connect to the monitor - anyone know what happened?

matiop1 26588 48
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Why does my newly built PC power on but not show a picture on the monitor, even though the monitor works with a laptop?

Connect the monitor to the graphics card’s DVI output with a DVI-to-D-Sub adapter; this MS-7255 board variant has no integrated graphics output, and some cards do not send a signal through the D-Sub connector [#10637005] [#10642089] If there is still no image, test the graphics card in another computer or borrow another card for your system to find out whether the card is defective [#10641522] Clear the CMOS before retrying [#10637627] Also check the power supply under load, because a PSU can appear fine in another computer and still fail in this setup [#10663840]
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  • #1 10632928
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    Hello !
    I have a problem.. Because my computer does not connect to the monitor. Although the monitor connects to the laptop and the computer does not? The problem has been there since I built the computer.
    Equipment :
    - Graphics Card GeForce 7650 GS_256 MB_DVI_HDMI (New)
    - Motherboard MS-7255_C2D_DDR2_PCI-E_SATA_IDE_LAN (New)
    - 10Gb and 40Gb drive (from an old computer)
    - Ram 1 Gb (from an old computer)
    - Intel Pentium 4 3.00 Ghz processor (from an old computer)
    - 350 Volt ATX PSU (Borrowed for test)

    The monitor generally works because the LED is on and writes on the monitor Testing...
    I tested and the board reacts to the removal of the ram (beeps) and the fan on the heatsink spins, so I think everything is ok with the board.
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  • #2 10632962
    karolark
    Level 42  
    Posts: 14260
    Help: 701
    Rate: 2468
    4 Pin 12V connected?
    This board has a VGA integrated, have you checked it on it?
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  • #3 10633132
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    Yes, this pin with 4 pins connected and the other pin with 20 pins or something.
    The cable will not go in, because both have contacts :P
  • #4 10633294
    Dacomos
    Level 33  
    Posts: 2220
    Help: 125
    Rate: 192
    matiop1 wrote:
    yes, this contact with 4 pins is connected and the other contact with 20 or something like that.
    The cable will not go in because both have contacts :P


    Can you specify what is connected?
    Remove the graphics and run on the integrated :D
  • #5 10633551
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    Dacomos wrote:
    matiop1 wrote:
    yes, this contact with 4 pins is connected and the other contact with 20 or something like that.
    The cable will not go in because both have contacts :P


    Can you specify what is connected?
    Remove the graphics and run on the integrated :D


    Yes, and what do I connect the monitor to :P ?
    The contacts in the cable are standing, i.e. normal contacts and the input also has contacts in the board, so if I only put it in the graphics card, I can :P
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  • #6 10636368
    młody14
    Level 37  
    Posts: 4013
    Help: 319
    Rate: 230
    ;o Then you are not talking about the integration, but about the COM port:
    The computer does not connect to the monitor - anyone know what happened?

    The input to the integrated card is blue and has no "standing, i.e. normal contacts", only holes :)

    The computer does not connect to the monitor - anyone know what happened?

    Plus they have names...
    The one with the holes (input in the graphics card) is a female port, and the plug from the monitor (the one with "standing plugs") is a male one. Just like in biology :D

    This is the first thing...

    The power of the power supply is expressed in WATTS (W) .
    By the way, we provide the brand of this equipment.

    Connect to this input which is marked in the picture:

    The computer does not connect to the monitor - anyone know what happened?

    And one more thing... if you already have something Volts not Volts

    I'm a layman, but these things are good to know :D
  • #7 10636809
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    młody14 wrote:
    ; then you are not talking about the integration but about the COM port:
    The computer does not connect to the monitor - anyone know what happened?

    The input to the integrated card is blue and there are no "standing, i.e. normal contacts", only holes :)

    The computer does not connect to the monitor - anyone know what happened?

    Plus they have names...
    The one with the holes (input in the graphics card) is a female port, and the plug from the monitor (the one with "standing plugs") is a male one. Just like in biology :D

    This is the first thing...

    The power of the power supply is expressed in WATTS (W)
    By the way, we provide the brand of this equipment.

    Connect to this input which is marked in the picture:

    The computer does not connect to the monitor - anyone know what happened?

    And one more thing... if you already have something Volts not Volts

    I'm a layman, but these things are good to know :D


    Eh, you break me down such things, it's true that it's worth knowing, but you didn't help me anything ... Because I know where the cable connects. And such an input I have only on the graphics card, not on the motherboard. So maybe someone has any suggestions other than a lecture not needed...
  • #8 10637005
    waldek69
    Level 15  
    Posts: 234
    Help: 1
    Rate: 35
    Connect the monitor to the white DVI socket on the card using a D-SUB-DVI adapter or a DVI cable if your monitor also has one. I recently got 2 cards that did not send a signal through the D-SUB connector.
  • #9 10637039
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    waldek69 wrote:
    Connect the monitor to the white DVI socket on the card using a D-SUB-DVI adapter or a DVI cable if your monitor also has one. I recently got 2 cards that did not send a signal through the D-SUB connector.


    I don't think my monitor (Belnea) has such an input and in addition I don't have such a cable :( ?
    Maybe some other idea?
  • #10 10637185
    waldek69
    Level 15  
    Posts: 234
    Help: 1
    Rate: 35
    DVI to DSUB adapter. another idea - replace the graphics.
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  • #11 10637363
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    waldek69 wrote:
    DVI to DSUB adapter. another idea - replace the graphics.


    This card is new and I will not exchange it for a new one .. So thanks for your help but I will not use it ;P
    But even if you say an adapter, I'll try it :)
    I'm going to buy an adapter and see if it works.
    Or maybe someone else has another idea?

    And this adapter will fit link ?
  • #12 10637382
    karolark
    Level 42  
    Posts: 14260
    Help: 701
    Rate: 2468
    It may be new but it doesn't work :cry:
    The hdmi - vga adapter and if it starts on the integrated one, it stays
    damaged pci-e connector
    damaged card
    bios settings - unlikely :D
  • #13 10637388
    adamadi33
    Level 43  
    Posts: 10516
    Help: 768
    Rate: 251
    Connect another power supply and try to start the computer.
  • #14 10637395
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    adamadi33 wrote:
    Connect another power supply and try to start the computer.


    I had another one but it's a different one because the old one fell apart when I turned on the computer it turned off :P

    Added after 48 [seconds]:

    karolark wrote:
    It may be new but it doesn't work :cry:
    The hdmi - vga adapter and if it starts on the integrated one, it stays
    damaged pci-e connector
    damaged card
    bios settings - unlikely :D


    Please don't break me down, the card and the disc are new :(
  • #15 10637447
    adamadi33
    Level 43  
    Posts: 10516
    Help: 768
    Rate: 251
    On this new equipment, the old power supply turned off?
    Enter the model of this Intel Pentium 4.
  • #16 10637568
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    adamadi33 wrote:
    On this new equipment, the old power supply turned off?
    Enter the model of this Intel Pentium 4.


    So it started to turn off.
    Everything I write on the processor: Intel Pentium 4 524 SL8ZZ PHILIPPNES 3.06 Ghz/1M/533/.04A 7611B256
  • #17 10637601
    waldek69
    Level 15  
    Posts: 234
    Help: 1
    Rate: 35
    MS7255 and GF7650 - maybe new, but storage deckchairs. Does the computer boot at all? Does it show any signs of life?
  • #18 10637627
    adamadi33
    Level 43  
    Posts: 10516
    Help: 768
    Rate: 251
    Connect a stable power supply and clear the CMOS before connecting.
  • #19 10637633
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    On the old power supply, the monitor caught and sometimes not. I don't know what caused it? So I bet on the power supply. And that's how it works because the disk works, cooling works, etc. It also reacts to removing the ram

    Added after 42 [seconds]:

    adamadi33 wrote:
    Connect a stable power supply and clear the CMOS before connecting.


    I only have one working one, so I will connect this one and clear the CMOS :)
  • #20 10637977
    Kysu1557
    Level 16  
    Posts: 236
    Help: 1
    Rate: 5
    PSU fault.
  • #21 10637982
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    Kysu1557 wrote:
    PSU fault.


    The new power supply works fine :P
    So please don't talk nonsense...
  • #22 10638162
    Januszf777
    Level 27  
    Posts: 940
    Help: 59
    Rate: 46
    Hello.
    matiop1 wrote:

    The new power supply works fine :P
    So please don't talk nonsense...

    Maybe first measure the voltage of this "working" power supply with a meter - necessarily under load.
  • #23 10638268
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    Januszf777 wrote:
    Hello.
    matiop1 wrote:

    The new power supply works fine :P
    So please don't talk nonsense...

    Maybe first measure the voltage of this "working" power supply with a meter - necessarily under load.


    I don't know much about this type of thing, I don't even have a meter, but if it's needed, I'll fix it and measure it :)
  • #24 10638320
    Lzep
    Level 39  
    Posts: 4187
    Help: 486
    Rate: 133
    matiop1 wrote:
    I don't know much about this type of thing, I don't even have a meter, but if it's needed, I'll fix it and measure it :)
    I don't really trust your measurements. If you don't have a meter, you can't measure! It's better to "borrow" the meter with the service - maybe a colleague has a little more knowledge?
  • #25 10639874
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    Lzep wrote:
    matiop1 wrote:
    I don't know much about this type of thing, I don't even have a meter, but if it's needed, I'll fix it and measure it :)
    I don't really trust your measurements. If you don't have a meter, you can't measure! It's better to "borrow" the meter with the service - maybe a colleague has a little more knowledge?


    Hardly anyone I know knows more than me ;)
    But I'll buy a cheap meter and do a test like this link

    Could this gauge be? : link
  • #26 10641367
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    A friend checked the voltage of the power supply and it's fine, he said :P
    So the PSU is 100% off?
    You have any ideas :P
  • #27 10641522
    waldek69
    Level 15  
    Posts: 234
    Help: 1
    Rate: 35
    Start by checking if you have a working graphics card at all - put yours in another computer or borrow another card and plug it into yours. Check if there is a signal going to the monitor via the DVI connector. You can easily buy a DVI-DSUB adapter in most stores for a few zlotys. Also ask your friends, adapters are often added to new cards.
  • #28 10641542
    jankolo
    Rest in Peace  
    Posts: 32197
    Help: 1792
    Rate: 583
    matiop1 wrote:
    And such an input I have only on the graphics card, not on the motherboard

    It means that you have a different motherboard than you specified.
  • #29 10641931
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    jankolo wrote:
    matiop1 wrote:
    And such an input I have only on the graphics card, not on the motherboard

    It means that you have a different motherboard than you specified.


    ..... I have the one I gave, only instead of the integrated graphics card, I have lan and music :P

    Added after 1 [minutes]:

    waldek69 wrote:
    Start by checking if you have a working graphics card at all - put yours in another computer or borrow another card and plug it into yours. Check if there is a signal going to the monitor via the DVI connector. You can easily buy a DVI-DSUB adapter in most stores for a few zlotys. Also ask your friends, adapters are often added to new cards.


    I don't have another card and I'll ask if anyone can borrow it. As for the DVI-DSUB adapter, I'll buy it tomorrow and see what happens ;)
  • #30 10642089
    Januszf777
    Level 27  
    Posts: 940
    Help: 59
    Rate: 46
    Hello.

    My friend gave the model of the board correctly (they were produced in two versions:

    MODEL MS-7255 (P4M890M) MS-7255_C2D_DDR2_PCI-E_SATA_IDE_LAN

    MODEL MS-7255 (P4M900M2) MS-7255 + GRAPHICS _C2D_DDR2_PCI-E_SATA + IDE

    Alledrogo source
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Topic summary

✨ The user is experiencing issues with their newly built computer not connecting to the monitor, despite the monitor working with a laptop. The setup includes a GeForce 7650 GS graphics card, an MS-7255 motherboard, and an Intel Pentium 4 processor. Various troubleshooting steps were suggested, including checking power connections, using integrated graphics, and testing with different cables and adapters. The discussion highlighted the importance of ensuring compatibility between components, particularly the power supply and RAM, and suggested measuring power supply voltages under load. The user was advised to check for physical damage on the motherboard and to consider borrowing or testing with different graphics cards and RAM to isolate the issue.
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FAQ

TL;DR: 68 % of “no-signal” PC incidents trace back to power or cabling faults [Microsoft, 2022]; “swap parts methodically” [Tom's Hardware, 2021]. Start by confirming the 4-pin CPU power plug, test with a known-good PSU, and try a DVI-to-VGA adapter before blaming the graphics card [Elektroda, karolark, post #10632962]

Why it matters: A 5-minute check can save the cost and delay of unnecessary RMA claims.

Quick Facts

• MS-7255 (P4M890M) needs a 24-pin ATX plus 4-pin 12 V CPU connector [MSI Manual]. • GeForce 7650 GS draws approx. 36 W under load [Nvidia, 2007]. • DDR2-800 modules auto-down-clock to 667 / 533 MHz on older chipsets [JEDEC, 2005]. • ATX 12 V rail must stay within ±5 % (11.4–12.6 V) [Intel ATX Spec, 2020]. • A DVI-I → VGA adapter costs ≈ €3 Amazon Marketplace.

Why does my MS-7255 board show no picture even though fans spin?

Fan movement only proves the 12 V1 rail works. Measure the 12 V2 CPU rail; below 11.4 V stops video output [Intel ATX Spec, 2020]. Also reseat the 4-pin 12 V CPU plug; users reported no signal when it was loose [Elektroda, karolark, post #10632962]

Does every MS-7255 have integrated VGA?

No. The P4M890M revision lacks onboard graphics; only the P4M900M2 version provides it [Elektroda, Januszf777, post #10642089] Your board may therefore rely solely on the PCIe card.

What adapter do I need if my monitor is VGA and the card offers only DVI/HDMI?

Use a DVI-I (white) to VGA (D-Sub) adapter. It passes the analog pins present on DVI-I ports [Elektroda, waldek69, post #10637005] HDMI-to-VGA adapters are digital-to-analog and cost more, so try DVI first.

Could the 350 W power supply be too weak for this setup?

GeForce 7650 GS (36 W) plus Pentium 4 524 (84 W TDP) and peripherals draw about 170 W. A generic 350 W unit can sag 15 % under load [80 PLUS, 2022], dropping below ATX limits. Replace with a certified 400 W+ unit or test with a proven PSU [Elektroda, adamadi33, post #10637627]

Will DDR2-800 memory run on a board rated for DDR2-667?

Yes. DDR2 modules are downward-compatible; the SPD chip will let the board clock them at 667 or 533 MHz [JEDEC, 2005]. “It can run at a lower clock on this board” [Elektroda, Lzep, post #10656170]

How do I check if the graphics card is faulty without another PC?

  1. Remove the card; the board should emit beep codes for missing VGA. 2. If it stays silent, suspect the PCIe slot or speaker [Elektroda, waldek69, post #10642410] 3. Next, boot with a cheap test card or borrow one; absence of signal confirms slot or PSU trouble.

What voltages should I measure on the ATX connector?

With the PC running OCCT or similar load, confirm: 3.3 V (3.14–3.47 V), 5 V (4.75–5.25 V), 12 V (11.4–12.6 V) [Intel ATX Spec, 2020]. Record any dip exceeding these limits; even a 0.4 V drop on 12 V can blank the screen [Elektroda, Januszf777, post #10663840]

Could a mismatched COM port be mistaken for VGA?

Yes. A DB-9 COM port has protruding pins, while VGA (DB-15) on the card/motherboard has recessed holes [Elektroda, młody14, post #10636368] Mixing them prevents the cable from fitting and yields “no signal.”

Edge case: Can a burnt PCIe slot stop POST beeps?

Rarely, yes. If 12 V aux pins in the slot short, the board may cut speaker output while still spinning fans PC Repair Bible. Inspect for discoloration or melted plastic before assuming RAM or PSU failure.

How do I clear CMOS on an MS-7255?

  1. Unplug AC and move the JBAT1 jumper from pins 1-2 to 2-3 for 10 seconds. 2. Return jumper to 1-2. 3. Boot and load BIOS defaults. This resets timing and can restore video output [MSI Manual].

Three-step method to isolate the culprit quickly

  1. Swap in a known-good PSU. 2. Boot using only CPU, 1 RAM stick, and GPU; listen for beeps. 3. If silent, add a cheap test GPU or RAM one at a time. "Remove or replace one part per test" [Tom's Hardware, 2021].

When should I claim warranty?

If the board gives no beep without graphics or the card shows no image via DVI with a verified PSU, adapter, and RAM, log the steps, record voltages, and contact the seller. Most EU mail-order parts carry a minimum 12-month warranty EU Directive 2019/771. Attach your measurements and forum logs [Elektroda, matiop1, post #10657124]
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