hi
my la-8241p dell 5520 would not power when i check the schematic i found the PQ101 not crossing power (look pic) i jumper pin 5 with VIN 19 dc and laptop turn on and boot fine BUT....

when i plunged the battery boot fine but if i connect the ac adepter only laptop turn on and then turn off after 2 second and not boot ...

this this my problem please help me i flashed bios and ec with working one

first, make sure PQ100/PQ101/PQ102/PQ108/PQ110 are ok, then
please measure on PQ101 pin 4, normally the voltage is about half of 19v, if not ....
check ACIN(normally about 3.3v), if not ....
check PR109 and DCIN(PU100 pin 22).

you try EC an bios

hi thanks problem solved with first post... thanks my friend