DA0U8AMB6A0 REV A No display, maybe dead processor?

[kalilinux25]

Tried changing New Memory and Bios Chip Latest and Old bin..

PLTRST# - 3.2V
SUSC# - 3.2V
DRAMRST - 1.3V
DRAM_PG - 3.3V
MAINON - 3.2V
IMVP_PWRGD -3.2V
+VCC_CORE - 0.8V
SLP_SUS_ON - 3.2V
HWPG -1.4V
SUSON- 3.2V
RSMRST # -3.2V
S5_0N- 3.2V
+VCC_GFX- 0.7V
+1.35VSUS - 1.3V


BOARDVIEW AND SCHEMATIC is attached.

[Sephir0th]

Re: DA0U8AMB6A0 REV A No display, maybe dead processor?

CapsLock Test done? No response?

[kalilinux25]

Re: DA0U8AMB6A0 REV A No display, maybe dead processor?

Yes no response on kb and hdmi

[mcplslg123]

Re: DA0U8AMB6A0 REV A No display, maybe dead processor?

HWPG-1.4V-This is the problem. Should be 3.3V. Check HWPG pins on each and every PWM. You can try to isolate them one by one by removing the diode connected on HWPG output of PWM(if no diode is connected, you may need to cut track of PG output of that particular IC). HWPG is pull up from 3V, so i dont see any reason for it to be pulled low. One of the pwm ic is definitely bad.

Your measurements dont indicate a bad soc so far.

[kalilinux25]

Re: DA0U8AMB6A0 REV A No display, maybe dead processor?

HWPG-1.4V-This is the problem. Should be 3.3V. Check HWPG pins on each and every PWM. You can try to isolate them one by one by removing the diode connected on HWPG output of PWM(if no diode is connected, you may need to cut track of PG output of that particular IC). HWPG is pull up from 3V, so i dont see any reason for it to be pulled low. One of the pwm ic is definitely bad.

Your measurements dont indicate a bad soc so far.

PU2 is not on the mb , pu5 , where i can cut , pmw like the 3v and 5v regulator sir?

[piernov]

Re: DA0U8AMB6A0 REV A No display, maybe dead processor?

Most parts connected to HWPG are no stuff (can be confirmed by looking at the board). Weird but may not be used at all on this platform. S0IX_PG on the other hand is at least connected to a few power rails.

[kalilinux25]

Re: DA0U8AMB6A0 REV A No display, maybe dead processor?

Most parts connected to HWPG are no stuff (can be confirmed by looking at the board). Weird but may not be used at all on this platform. S0IX_PG on the other hand is at least connected to a few power rails.

what do you suggest do i do sir?