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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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  • #31 10642117
    fiedek187
    Level 14  
    Posts: 105
    Help: 5
    Rate: 1
    From experience, I'd bet on the board or the power supply. Or a card. And maybe a little humility, because usually experienced people on this forum know what they write (at least they distinguish Volts from Watts). So what's new? New doesn't mean good. Do what the previous ones did.
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  • #32 10642227
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    Januszf777 wrote:
    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

    Source Allegro


    Well, this model: MODEL MS-7255 (P4M890M) MS-7255_C2D_DDR2_PCI-E_SATA_IDE_LAN

    Added after 5 [minutes]:

    fiedek187 wrote:
    From experience, I'd bet on the board or the power supply. Or a card. And maybe a little humility, because usually experienced people on this forum know what they write (at least they distinguish Volts from Watts). So what's new? New doesn't mean good. Do what the previous ones did.


    And what do you think I'm doing so I write and Mr. spec betting is a game of roulette :P
    And you bet basically everything, so I can help you and the power supply falls off because I checked it on another computer and the board, the graphics are new, so I doubt it's damaged because you can't see any damage.
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  • #33 10642410
    waldek69
    Level 15  
    Posts: 234
    Help: 1
    Rate: 35
    You need to distinguish new from unused. These boards and graphics were new a few years ago and now they're just storage deck chairs. It is not known where and under what conditions they were aged.

    Take out the graphics and write if the board "beeps" when you fire without graphics.
  • #34 10642874
    fiedek187
    Level 14  
    Posts: 105
    Help: 5
    Rate: 1
    I bet basically everything, because this problem and similar failures are usually caused by these elements. You need to check this board somehow (look at the capacitors) and the card.

    This memory you gave is in 1 bone or two? If you know, give the clock frequency of the work.
  • #35 10654335
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    waldek69 wrote:
    You need to distinguish new from unused. These boards and graphics were new a few years ago and now they're just storage deck chairs. It is not known where and under what conditions they were aged.

    Take out the graphics and write if the board "beeps" when you fire without graphics.


    No reaction to the lack of graphics..

    Added after 41 [seconds]:

    fiedek187 wrote:
    I bet basically everything, because this problem and similar failures are usually caused by these elements. You need to check this board somehow (look at the capacitors) and the card.

    This memory you gave is in 1 bone or two? If you know, give the clock frequency of the work.


    In one GOOD RAM DDR2 1GB PC2-6400 DIMM
  • #36 10654987
    fiedek187
    Level 14  
    Posts: 105
    Help: 5
    Rate: 1
    Try inserting another memory but correctly. Check these capacitors on the motherboard.
    And by the way, you bought a board that supports module timings up to 667 MHz ... the memories have a clock speed of 800 MHz.
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  • #37 10655200
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    fiedek187 wrote:
    Try inserting another memory but correctly. Check these capacitors on the motherboard.
    And by the way, you bought a board that supports module timings up to 667 MHz ... the memories are clocked at 800 MHz.


    So what my memory has a clock speed of 800 mhz and the board supports up to 667 :O ?
  • #38 10655480
    waldek69
    Level 15  
    Posts: 234
    Help: 1
    Rate: 35
    Take the best computer and go to the first store you come across. They will put different graphics and memory. More will be known. Now we're just in the dark. I'm betting on the motherboard. I don't remember exactly, but it seems to me that these models "beeped" when the graphics were not plugged in.
  • #39 10656092
    fiedek187
    Level 14  
    Posts: 105
    Help: 5
    Rate: 1
    matiop1 wrote:
    fiedek187 wrote:
    Try inserting another memory but correctly. Check these capacitors on the motherboard.
    And by the way, you bought a board that supports module timings up to 667 MHz ... the memories are clocked at 800 MHz.


    So what my memory has a clock speed of 800 mhz and the board supports up to 667 :O ?


    Yes. This means that the motherboard will not fully utilize the speed of the memory chips
  • #40 10656170
    Lzep
    Level 39  
    Posts: 4187
    Help: 486
    Rate: 133
    fiedek187 wrote:
    Yes. This means that the motherboard will not fully utilize the speed of the memory chips
    But that doesn't mean it can't run at a lower clock on this board! I myself have nominally 400 and 433 MHz memories working on a 353 MHz bus, because this is the best way on my board!
  • #41 10656171
    fiedek187
    Level 14  
    Posts: 105
    Help: 5
    Rate: 1
    Sure it can :)
  • #42 10656449
    Januszf777
    Level 27  
    Posts: 940
    Help: 59
    Rate: 46
    Provided that everything in the BIOS (timing, FSB...) is set correctly.
  • #43 10657124
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    I need to know if it's the fault of the disc or the card :P
    If any of these components do not work or are damaged, they will refund my money under warranty :P
    Otherwise, I'll talk to them if they don't give it back
  • #44 10657927
    waldek69
    Level 15  
    Posts: 234
    Help: 1
    Rate: 35
    Without a second replacement card, it will be hard to move on. If you bought the disc and the card in the same place, then send back the set.
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  • #45 10658975
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    I wrote to them regarding the warranty, so far no response :P
  • #46 10659200
    angelo1966
    Level 16  
    Posts: 132
    Help: 10
    Rate: 13
    If on the old power supply the board starts once and sometimes not, and on the new one it does not start at all, the fault is clearly on the power supply side, put on another working power supply and it will be after trouble

    Added after 2 [minutes]:

    You may also have a problem with the ram memory, write what board these memories were with before because there were bones that did not work with Via chipset boards

    Added after 1 [minutes]:

    but in general, I bet on the power supply because if it started somewhere else, the memory should be ok
  • #47 10659524
    matiop1
    Level 9  
    Posts: 33
    Rate: 2
    The power supply is operational :P
    Because it works with another computer :)
  • #48 10662079
    fiedek187
    Level 14  
    Posts: 105
    Help: 5
    Rate: 1
    Then do the rest of the tests. Check if the capacitors on the board have bulges, borrow other memories from a friend, etc. Without this information, we can't say much.
  • #49 10663840
    Januszf777
    Level 27  
    Posts: 940
    Help: 59
    Rate: 46
    Hello.
    A few posts above I asked you to measure the power supply under load and what?
    matiop1 wrote:
    The power supply is operational :P
    Because it works with another computer :)

    The fact that another computer is working does not prove anything, the engine from the mower will not move the tank even by 1mm. Can you give these voltages (all and necessarily under stress - e.g. with OCCT running) even when connecting the set that works.
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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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