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i was able to backup the original kb9542 even though it was detected as a kb9010 with the rt809. Could you tell me if this file is corrupt or if the chp is defective
Can't seem to find the exact EC dump but i flashed it with a random file and now it powers up but the power button is flashing a error code and it doesn't post. Is there a bios recovery method that will correct the EC also?
So EC ROM was indeed corrupted.
Many brands have EC ROM included in the main BIOS; not sure if is the case here.
Just search for coincidence between both; need to read main BIOS of your board, or find a dump on Internet.
You can also do a search inside the files extracted from official Dell update.
Upload somewhere the EC ROM actually used and your main BIOS.
I copied the EC from the other matching board and now this one is working. I forgot to mention that I also found and programmed files to UH4 UT2 AND UE2. i'm guessing that those three files will get the other board up and running
I still have no luck with the other board after writing to the firmware chips. I'm noticing that Pbtn_out is still missing. lid_sw# is 3v and VCIN1_AC_IN is 3v. I used the EC firmware from this one to make the other one work
it all seems to be EC related. I reinstalled the EC contents and now PBTN_OUT# is 3v but it doesn't pulse . I'll erase and reload it a few times and see what happens. At least I have one working board from all this
the lack of signal EC_RSMRST# seems to be the root. it doesn't pulse or anything. pm_slp_s5 does pulse just like the rest of signals and inital voltages
+3V_PCH pulses at 3v then drops back to 0v. pbtn_out# doesn't pulse with the charger unless you hold down the power button for 10 seconds. then it goes from 3v to 0v and stays at 0v but when the power button is pressed it will pulse at 3v. Pbtn_out# will pulse right away with only the battery attached. What determines the EC_RSMRST signal?