Re: HP 15-au057cl
check the mosfets again. If mosfets are good, order the chip from ebay or aliexpress
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Re: burnt ic bios
Get a schematic first. Check what size bios chip is required. Then search bios dump for this machine. Then flash the dump onto adequate size bios chip (manufacturer can be different then original) and you're all set to go
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Re: Dell Latitude E5580
Check resistors near BQ chip (charger IC). You will find it on the schematic board. Most Dell's are all alike.
If resistor goes bad the IC cannot boot up. In the schematic you will find power sequence. Its is important - the charger IC is one of the first in this sequence.
Also, keep in mind that charged-id pin rail can be broken too. Measure if you get any charger id at all (above 3 volts)
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