[Solved] Lenovo B590 Wistron LA58 MB 11273-1 48.4TE01.011 UMA - does not start.

Hello. Wistron LA58 MB 11273-1 48.4TE01.011 board. Board version without dedicated graphics (UMA).
Question: What resistor to use between the power supply identification pin and ground? I tried on 270?, 560? and 10k? resistors. The same situation on each (and without a resistor) - after applying the power supply, the board consumes 20mA for a while, then increases to 110mA, after a while it drops to 20mA, then increases again to 110mA and so on and on, unless I hold the power button pressed - then current consumption 20mA all the time. No reaction to a short press of power. 3V / 5V voltages on the main converter are still present.
I will not move on without being sure that I am using the correct resistor for the ID pin. I do not have the original power supply to check. The battery is also missing. I don't know the record's past. At least nothing was buried with her.

In the attachment there is a diagram of the LA48 board - more or less the same.
Greetings.

Edit:

Ok, I already know that this is not a resistor problem - on the pin. 99 KBC I have 1.7V, which means it "sees" the 65W power supply and the board should start. I keep searching.

At the beginning. read (lenovo-battery-not-installed) Link

Org. Aku will be expensive, around $ 40-50 (probably the cheapest ... aliexpress)


Try again "myk" with RTC battery (off for a few minutes)


Another album,
LENOVO_B590-20208
LA58 MB 11273-1,48.4TE06.011
25Q64CVSIG (U6001) Bios
25Q32BVSIG (U6002) kbc
BIOS: H1ET84WW (1.22) 2013-11-26
kbc: H1EC34WW (1.14)

ps
You have two chips on your motherboard (LA58 MB 11273-1 48.4TE01.011 UMA): u6001 / 6002?
- or one 8MB chip under Bios

You need to find the right Bios (like one chip) with
system unit serial number
MAC address (internal LAN)
Eg like this service soft G485G585.rar

Quote:

B590 LA58 (LA58 11273-1 48.4TE01.011)
- BIOS: H5ET69WW (1.12) 2012/11/15)

Find in your batch> serial no., And MAC and then use Hex editor and put in this .. found, correct> e.g. H5ET69WW.zip
* from B590 (LA58 MB 11273-3 48.4TE01.031) / LA58 11273-3 48.4TE05.31

How will nap. 3.3 and 5V and on the 3.3V button
- further according to "starting conditions: signals and voltages ...."> primer "

Quote:

Before push start button:
0. When BIOS & KBC -firmware 100% are working
1. When KBC power is present, his quartz working and KBC reading the Bios data (look data exchange on BIOS chip an oscilloscope)
2. When ACIN = 3.3V
3. When LID_SW # = 3.3V
After push start button:
4. When KBC drop RESET from SouthBridge, >> EC_RSMRST # = 3.3V
5. When by pressing of the power button the signal ON / OFFBTN # falls to zero and the same signal is broadcast in PBTN_OUT #
6.When from the SouthBridge signals PM_SLP_S3 # and SLP_S5 # are drop, ie voltage on them will be 3.3V
Under these conditions KBC should give command for start.

SM after the phrase: wistron la58 schematic
e.g. the Elvikom forum Link

Generally speaking, "hard case" because it's Lenovo (IBM)

So yeah. At the moment when the current consumption increases (it lasts less than 2 seconds), all converters start except VCC_CORE and VCC_GFXCORE. All S0 mode voltages also appear.
I have two BIOS dice - U6001 and U6002. Both reprogrammed with batches found in the network, but it did not change the behavior of the album in any way.

For now, I am waiting for the processor to be replaced.

Edit:

I substituted the processor and the same. For some reason the VCC_CORE converter on the TPS51640A does not work.

miecho18 wrote:

What resistor to use between the PSU ID pin and ground?

558om

miecho18 wrote:

after supplying power, the board consumes 20mA for a while, then increases to 110mA, then drops to 20mA

Something too little that even PCH does not turn on, probably not sure, or a desoldered / damaged bridge as for me, since all voltages are except VCC_CORE and VCC_GFXCORE

See if + 19V did not go on the cpu, through the keys (probably PU4302 and PU4301) with the TPS51640a
RJ?03?8 Renesas wrenches (2x N-ch mosfet) Link
or FDMS3664S Link


Look at SM and DCBATOUT_VCC_CORE and pin. 2,3,4,10 (Drain 1) PU4302
* famous PR4216 resistor (10k)
* as for TPS you have pin.16 (VR_ON) -3V, then ... voltage should appear
* see oscilloscope for data exchange (SVID) between chip and cpu
H_CPU_SVIDALRT #
H_CPU_SVIDCLK
H_CPU_SVIDDAT

ps
I haven't checked my MS with yours, maybe it's the same?
In ver. (LG4858L uma mb) is 3 phase cpu power supply:
-2_phase from tps51640a, 3-phase on tps51601.

Due to "flooding> right touchpad) the symptom is similar (missing at least VGFX_CORE) >> damaged kbc
* crashes kbc, cpu, half keys and TPS51640

20mA - check for any visible damage to the NCB (hole).

The record went to pieces. I did not mention KBC - there was no desire, but it did not have a burned hole. Thanks to everyone for the answers.
Greetings.