Re: Dell xps 13 9343 - dead



I'll look at the schematics and see if I can find that rail... I've never tried to troubleshoot something like this so hopefully I can find the rail...

It looks like the part that died is a AO4407AL_SO8 MOSFET from looking at the schematics.

Can I just check the power/ground legs of the MOSFET once I remove it to check for 19v there?...

Re: Dell xps 13 9343 - dead

Ok, so I was thinking... well it didn't try and power up yesterday with the power supply not connected. I tried just now unplugged and also plugged in and it fires up, but I can see a faint Dell logo so maybe that chip has something to do with the turning on the LCD backlight?

edit: and someone posted the schematic as I was typing this up... I'll take a look at it, thanks SMDFlea!

I have a DELL XPS 13 9343 that I've been using for almost six years now and it finally decided to bite the dust on me yesterday. It does not try to power on at all... I get no light on the power button when pressed. I'm not sure if this is a common failure on these, but can someone tell me what the chip is that is burnt up in my picture? I want to say it was marked T or P 070 or Q70 (on the PCB)? The chip totally burned up so I can't read the markings on the top of it. I don't have a schematic for this as I don't normally repair this kind of stuff... I repair arcade PCBs in my collection that...

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Joe from Georgia... I mostly repair old arcade PCBs, but I have a Dell XPS 13 that decided to die yesterday on me so I'm just looking for some help getting some parts I need to try and fix it for fun.