la-9104p MB 7 Beeps error and no display

[Techtiger]

Need help i have Dell 3521 la-9104p MB 7 Beeps error no display
Histoire of the MB 7 Beeps power up no display CPU CORE missing, close up inspection sort of glue liquid damage bottom side , clean up the MB flash EC BIOS from the Badcaps Mcpslsg123 have upload it MB power up with post all ok except now the MB randomly goes to 5 Beeps error with out post no image change the BIOS battery same error with or without BIOS battery, do I have to flash main bios ?

[mcplslg123]

Re: la-9104p MB 7 Beeps error and no display

What's the harm friend?? I always prefer flashing both main+ec-so that they belong to same version. Have seen cases where main and ec bios version difference creates problem. RTC circuit should be checked.

[Techtiger]

Re: la-9104p MB 7 Beeps error and no display

What's the harm friend?? I always prefer flashing both main+ec-so that they belong to same version. Have seen cases where main and ec bios version difference creates problem. RTC circuit should be checked.

I flash the main bios but the problem remains same I did trace RTCVCC up to PCH 3caps seems to be ok

[imranromi]

Re: la-9104p MB 7 Beeps error and no display

Need help i have Dell 3521 la-9104p MB 7 Beeps error no display
Histoire of the MB 7 Beeps power up no display CPU CORE missing, close up inspection sort of glue liquid damage bottom side , clean up the MB flash EC BIOS from the Badcaps Mcpslsg123 have upload it MB power up with post all ok except now the MB randomly goes to 5 Beeps error with out post no image change the BIOS battery same error with or without BIOS battery, do I have to flash main bios ?

When give beep then press power button about 20,30 sec then press again and check what happen.
Read post #6
https://www.badcaps.net/forum/showthread.php?t=70433

[Techtiger]

Re: la-9104p MB 7 Beeps error and no display

When give beep then press power button about 20,30 sec then press again and check what happen.
Read post #6
https://www.badcaps.net/forum/showthread.php?t=70433

Imranromi post#6 not working for me Mb randomly goes to five beeps

[caspian]

Re: la-9104p MB 7 Beeps error and no display

When it gives five beeps, which voltage/signal is not present?

[Techtiger]

Re: la-9104p MB 7 Beeps error and no display

When it gives five beeps, which voltage/signal is not present?

VCC GFC CORE PL700 missing with 5 beeps

[caspian]

Re: la-9104p MB 7 Beeps error and no display

Had the liquid infected the PCH or its nearby components?

[mcplslg123]

Re: la-9104p MB 7 Beeps error and no display

Reflash both main and EC from another batch. To me it still seems bios issue.

[Techtiger]

Re: la-9104p MB 7 Beeps error and no display

Had the liquid infected the PCH or its nearby components?

sort of glue liquid damage bottom side but not near PCH

[Techtiger]

Re: la-9104p MB 7 Beeps error and no display

Reflash both main and EC from another batch. To me it still seems bios issue.

ok will do and let you know

[Techtiger]

Re: la-9104p MB 7 Beeps error and no display

the problem remains same after flashing couple of bios the MB randomly goes to 5 Beeps error with out post no image

[lapfix]

Re: la-9104p MB 7 Beeps error and no display

Got the same problem at 2 boards..change dump /chip still the same ,try to clean ME region the original dump still this 7 beeps but...
I see a trick posted by imranromi for 5 beep : press power button hold 20 sec and press again wait for display.
I try it still got the 7 beep but i have 1.124V at Pl701 ( The VCC cORE ) and no display...the current go from 0.12 amp to 2.20 .

any idea about that !

[Techtiger]

Re: la-9104p MB 7 Beeps error and no display

Got the same problem at 2 boards..change dump /chip still the same ,try to clean ME region the original dump still this 7 beeps but...
I see a trick posted by imranromi for 5 beep : press power button hold 20 sec and press again wait for display.
I try it still got the 7 beep but i have 1.124V at Pl701 ( The VCC cORE ) and no display...the current go from 0.12 amp to 2.20 .

any idea about that !

SIO pin 4 5 7 8 9 Voltage ?

[lapfix]

Re: la-9104p MB 7 Beeps error and no display

All 3.41v

[Techtiger]

Re: la-9104p MB 7 Beeps error and no display

you have 3 resistors near the UH6 check voltage both sides of them

[lapfix]

Re: la-9104p MB 7 Beeps error and no display

Yes i measure them before ,but only on OHM ... all are 33 OHM.
Votage RH265 = 3.4v from the 2 sides
Voltage RH266 / RH267 = 0V from the 2 sides

[lapfix]

Re: la-9104p MB 7 Beeps error and no display

For DRAMRST# , i think it must be active low ! i find 0.049v at pin 30 of ram slot.

Any other place to check !!

[Techtiger]

Re: la-9104p MB 7 Beeps error and no display

Voltage on QC2 all pins do you have a working la-9104P CR108? RH266 / RH267 To check the voltage on those 2 resisters

[lapfix]

Re: la-9104p MB 7 Beeps error and no display

QC 2 :
D = 0.049v
G = 3.40v
S = 0.049v

RC108 = 1.5v from one side and 0.049v from the second side.

I can find a working motherboard to compare RH 266/267.