Dell Inspiron 5559 no display problem

Model: Dell Inspiron 5559
Board id: Compal LA-D071P AAL15 Rev 1.0 (A00)

When connect adapter, laptop automatically running without pressing power key. Power comsumption on DC power supply is about 0.450 amp. Sometimes it's about 1.5 amp and then drop to about 0.450 amp. After opening 2, 3 times, PQ201 was shorted. So i Replace PQ201 and test again and after opening 2, 3 times PQ201 was shorted again. Resistance to ground on coils PL200 is 1 Ohm (with RAM) / 17 Ohm (without RAM). Remove PJP200, PLP202 and +1.35V_MEM side is 17Ohm and +1.35VP side is 78K (Wtih RAM). Need help.

PL100 - 3.3V
PL101 - 5V
PL1102 - 0.9V
PL1103 - 0.9V
PL601 - 1V
PL501 - 1.8V
PL200 - 0V
PL301 - 0V
PL603 - 0V
PL605 - 0V

Resistance to ground on coils
PL200 - 1 Ohm (with RAM) / 17 Ohm (without RAM)
PL301 - 44 Ohm
PL603 - 10 Ohm
PL605 - 10 Ohm

Try to locate where the short is.
Do the test described here on +1.35V_MEM PJP200, PJP202 open (explained at the end of lesson 3):
post5699.html#p5699

I already tried inject with DC powersupply with 1.35V to +1.35V_MEM side. Power comsumption on DC supply is only 0.063 and differect to locate shorted parts.

During the voltage injection check that it does not heat the PCH contained in the APU (remove the cooling system) or the rams.

Yes. I found shorted RAM. I replace with good one and now resistance to ground on +1.35V_MEM side is 18 Ohm (With or Without RAM). Is this ok?

This resistance is definitely too low.
The RAM controller inside the APU hybrid is unfortunately very likely damaged. The resistance is too high for a short circuit test, so probably the only option is to remove the APU from the board to make sure.