HP All-in-One - 20-c001la DAN91AMB6DO REV: D

HP All-in-One - 20-c001la
DAN91AMB6DO REV: D
BIOS 081BA

Quanta N91A
Boardview
Schematics
Molokai Intel Brasswell-M Platform Block Diagram
n91a molokai_braswell_pv_0125
BIOS
HP All-in-One - 20-c024cn dan91amb6d0
EC ITE
n91a.jpg
 

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Hi, i came to repair this motherboard and the issue is that it does not give me video. Apparently everything else works (HDD, Cooler). Check the lvds connector on the board and I saw that LCDVCC does not arrive. I checked U1 (since this is the one that delivers LCDVCC) and I found that it is not enabled (the 2136_LVDS_PWEN_R signal is not present according to the schematic), I then went to the RTD2136N and verified that it is not enabled either (the PCH_DPST_PWM signal that comes from of the PCH). What do you think it could be?
Could it be a BIOS problem or a PCH problem? I'm going to try flashing the BIOS.
 
jclau said:
Hi, i came to repair this motherboard and the issue is that it does not give me video. Apparently everything else works (HDD, Cooler). Check the lvds connector on the board and I saw that LCDVCC does not arrive. I checked U1 (since this is the one that delivers LCDVCC) and I found that it is not enabled (the 2136_LVDS_PWEN_R signal is not present according to the schematic), I then went to the RTD2136N and verified that it is not enabled either (the PCH_DPST_PWM signal that comes from of the PCH). What do you think it could be?
Could it be a BIOS problem or a PCH problem? I'm going to try flashing the BIOS.
Click to expand...
I can only help with BIOS related hardware problems that need to be checked and fixed directly
 
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