Dell Inspiron N5110 dead

[Andreasbest]

Hello!
Today i received a piece of junk N5110 that is completely dead.
I see 19.5v on Drain of PU4002 and 2.7v @ PWRBT1 pin 3 that turns to 0v when i press the power button, nothing happens though, no led activity, no fan.
Any advise welcomed

[mcplslg123]

Re: Dell Inspiron N5110 dead

The information provided is not sufficient enough to give suggestion. Start with 3V/5V present on coil or not?? Check PSL Logic working or not. LIDSW# present or not.

[Andreasbest]

Re: Dell Inspiron N5110 dead

The information provided is not sufficient enough to give suggestion. Start with 3V/5V present on coil or not?? Check PSL Logic working or not. LIDSW# present or not.

Hello.
No voltage at coils, no at all.

[Andreasbest]

Re: Dell Inspiron N5110 dead

I feel a very light heat on this region of the MB, so oight that i'm not sure what component causing it.
Perhaps is from the opposite side where these tiny FET are.

[Andreasbest]

Re: Dell Inspiron N5110 dead

Thermal cam indicates heat at PC4103
What do you think?

[Stevedb]

Re: Dell Inspiron N5110 dead

If the capacitor is heate you must reoved and test if short is gone

[Andreasbest]

Re: Dell Inspiron N5110 dead

I don't get it, the capacitor doesn't indicate short to GND in neither of it's pins or between it's pins.
Why it's overheated?

[Stevedb]

Re: Dell Inspiron N5110 dead

Because it is probably partial shorted. Has resistance a capacitor if you removed it must be Ol (open line )

[Andreasbest]

Re: Dell Inspiron N5110 dead

I'll replace it, what is the value or it?

[SMDFlea]

Re: Dell Inspiron N5110 dead

I'll replace it, what is the value or it?

It says in the file name 1U 25V , so 1uF 25 volts

[Andreasbest]

Re: Dell Inspiron N5110 dead

You solve it my friend, looked like hieroglyphics to me
Going to replace it and come back with results.

[Stevedb]

Re: Dell Inspiron N5110 dead

I hope you fix it. Congrats man.

[Andreasbest]

Re: Dell Inspiron N5110 dead

Cap replaced, no heat now but MB still completely dead.
Other advises please??

[Stevedb]

Re: Dell Inspiron N5110 dead

Give a hd pictures front an backwith all voltages on the
Coils also the resostance. Resistancewil be measure without power , bioisbattery , memory , wlan card etc.

Good luck

Regards Steve

[Andreasbest]

Re: Dell Inspiron N5110 dead

No voltage at all coils as i said before.
What else can we do?

[Andreasbest]

Re: Dell Inspiron N5110 dead

Welcome to the forums!
Why are saying that?

[Andreasbest]

Re: Dell Inspiron N5110 dead

Bump

[mcplslg123]

Re: Dell Inspiron N5110 dead

Measure voltage on all pins of 3/5V regulator and post it here. What is the consumption on your dc supply in offline condition??

[Andreasbest]

Re: Dell Inspiron N5110 dead

Ok i'll measure later.
The dc supply stays on (Dell blue led), no shortcircuit detected.

[Andreasbest]

Re: Dell Inspiron N5110 dead

Measure voltage on all pins of 3/5V regulator and post it here. What is the consumption on your dc supply in offline condition??

You mean the PU4103 ?
That's the only component where 3 and 5v are meeting.