Hai friends iam.new to this site ineed some help i have lenovo g470 laptop problem is when we press power button lights on.and off in 2 secno display nothing in dc supply machine there is ampears showing 12 only and all voltages are good fine and before power on susp voktahe is 3.0 k amd when we press power button it is going to 0v and i flashe the ec and main bios still same problem plz help me out
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Re: Hai friends iam.new to this site ineed some help
I schematic when i checked near q111 and q110 +3VALW TO +3VS and +5VALW TO +5VS in this page before power on q111 and q110 gate side susp is ok 3.0 and there is no voltage on drains side +vsb voltages amd when we press power button this susp is going 0v and +vsb is 20v ok plz help me what is the problem is this
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Hello folks,
following problem on an E15 Gen2 with i5 processor (NM-D011):
Doesn't start
SUSP - high (5.1V)
SUSP# - low (0V)
Pin124 (SUSP#) on the EC resistor to GND is 80kohm.
Does anyone know why the EC doesn't output SUSP#?
What requirements do you need to get a high there?
Thank you!☺
Schematic: HERE... -
Hello, I've been struggling with this one today. I'm troubleshooting a Lenovo 300-15IBR (board BMWC1/BMWC2 NM-A471) that turns on the power LED and does a bit of fan spin but nothing else. 3v3sb and 5vsb present, no 1.05v, no 1.35vddr, no vcore, no 1.8vsb.
BIOS has been reflashed with one I found here, supposedly tested OK by someone else. I don't have an EC programmer unfortunately.
I looked around and SYSON is 0v, SUSP# is 0v too. Forcing them to 3v3 enables the 1.35v rail, but the 1.05v and 1.8v rails are still missing (generated by PU704). EN_1P05A signal is 3.3v, and IN_1P05A... -
I have a Mb LA-A993P REV 1.0 computer, I am guiding myself with these two shared boards. ;
there are some ICs that are not the same, in this case those of the PU1501 (JD4TB) and PUH1 (NF4SA) images.
n, please identify.
330mA of consumption after 8 seconds turns off. +3VALW AND +5VALW present, EC_RSMRST# , LID_SW# , EC_ON# , ACIN# present.
SUSP# NOT PRESENT, which would be this the problem does not turn on sub-sources Any leakage?
I also notice that in the PLH2 coil that belongs to +1.05VS according to the drawings I am not sure,
...06-27-2024, 06:11 PM -
please help friends thinkpad T470 board CT470 series NM-A931 error post "bottom cover tamper detection error"
I've already
flashed the bios clean me and updated from the Lenovo site, then removed the switch and immediately jumped the S3 from pins 1 to 4, 2 to 3 but the problem remained the same, thank you -
Hello.
Have this HP Omen 17-an108nc that have no EN sig to power rails/no SUSP/
It have 3.3VALW and MAIN and EC bios 3.3V. But when i push power button nothing changes and board reset about 5seconds
i suspect bad chipset that after recieving PWRBTN from EC do not have start SUSP, but dont have BV or schema. is some way to check if PCH is bad?
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