These are the measurements I took from pq3 and pq4? These are the voltages prior to pressing the power... After pushing the power button the 5 volts drops to 0.00 and the 19.6 volts drops to 0.5....
not at all,,, after replacing the ribbon cable and the UL indicator board I get no beeps and the LED's dont light up... I know the board receives power, theres just no beeps or LED codes... Prior to that I did get the 7 beeps from the speakers...
okay i get
0volts PCH_PWR_EN before power and 0volts after power is pressed
0volts PCH_PWR_EN# before power and .3volts after power is pressed and it drops immediatly to 0.00 this was at qz15 on page 45,, pin 3 gets 5valw...
SUSP = 0 volts
SUSP# = 0 volts
SYSON = 0
SYSON# = 0
It would be better not to change the main bios if it is on a different IC.
make a backup of the main bios first.
If you reprogrammed EC and got no result, then you can attempt reprogramming the main bios.
it is uh14.
probably you don't need to buy.
search Dell's website.
the main bios can be found in the following page: https://www.badcaps.net/forum/showthread.php?t=53269
other technicians may provide the EC firmware here.
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