DELL Latitude 3500 no image, fan max speed, caps lock frozen

[huzo]

Dell latitude 3500
Board BOLT-L UMA MB
17938-1
FW8G6$LA

when i press the power, fan goes full speed, power button lights up , and caps lock light is on, the screen polarises, goes dark,no backlight...All voltages present, except PL4701, but that's probably for GPU power later....

I've tried a few dumps from posts, it always acts the same, so i thin it's not a bios issue...

No shorts found on the board...

What should i try next?

[minaedward]

you can try to remove the keyboard and start the laptop without it

[mon2]

Replace the CMOS RTC battery and test again.

[huzo]

you can try to remove the keyboard and start the laptop without it

Ofcourse i did that, i am at the board repair level already, not at the diagnostic part


mon2, there is no RTC battery..

[mon2]

Review the voltage to ground of:

CPU_SMB_SCL_THM
CPU_SMB_SDA_THM

[huzo]

Review the voltage to ground of:

CPU_SMB_SCL_THM
CPU_SMB_SDA_THM

unfortunately, i don't have the boardview to find the points...

[mon2]

Is this your board?



Review U2601, pins 7 & 8.

[huzo]

yes it is!

[huzo]

anyone any ideas what to look for next? It's strange that all the voltages are present, the bios was flashed with 3-4 different dumps, and it alays acts the same...even without RAM it's the same...but 1.2V is present...maybe ram controller?

[AxowFlow]

anyone any ideas what to look for next? It's strange that all the voltages are present, the bios was flashed with 3-4 different dumps, and it alays acts the same...even without RAM it's the same...but 1.2V is present...maybe ram controller?

Hello,
Did you manage to find your problem?