Dell 5030 - dell inspiron m5030 - does not respond to ON

molanos wrote:

I have a short on:
PL4901
PL4702
PL4701

Specific values of resistance give.

boro1234567 wrote:

molanos wrote:

I have a short circuit on:
PL4901
PL4702
PL4701

Specific values of resistance give.

Sorry, I do not have a short circuit, I forgot to pull out the processor and memory.

The meter is set to 20k

PL7402 is 1.30
PL7401 is 1.30
PL4901 has 0.01

PL4602 has 1.88
PL4601 has 19.2 - meter set to 200k

molanos wrote:

Sorry, I have no short circuit, I forgot to pull out the processor and memory.

The meter is set to 20k

PL7402 is 1.30
PL7401 is 1.30
PL4901 has 0.01

PL4602 has 1.88
PL4601 is 19.2 - meter set to 200k

Can you give the measured value with the appropriate unit?

Yes PL4901 is shorted to ground.

molanos wrote:

Yes PL4901 is shorted to mass.

Keys checked?
The service power supply is invaluable here.

boro1234567 wrote:

molanos wrote:

Yes PL4901 is shorted to ground.

Keys checked?
The service power supply is invaluable here.

No service power supply. What for the keys is not really know what's going on.
Please, explain to me how to check the keys and how they look on the PCB .....
... it's about transistors ... ??

So the key keys are powerful high performance transistors, how to check them - the easiest meter on the diode test, I suggest reading something from beginner literature without images of course