Re: Lenovo Ideapad 305-15ibd died and won't turn on.

Thank you for your help so far!

I will get my hands on a hot air station and fet and try that. Am I looking for the resistance to be 0 like when it isn’t on the board?

Re: Lenovo Ideapad 305-15ibd died and won't turn on.

PQ301 - diode mode
Pins 8, 1 - .972 ohm
7, 2 - .664 ohm
6, e - .662 ohm
Gate -> source .262 ohm

PQ302 diode mode
8, 1 - 0
7, 2 - 0
6, 3 - 0
Gate, source - .262ohm

Re: Lenovo Ideapad 305-15ibd died and won't turn on.

I've tested pq301 and pq302... pq302 drain to source on the continuity test beeps which according to tutorial means it's damaged?

Also diode mode produces measurement of 0 resistance which indicates it is defective but I'm not sure.. Pq301 reads just a 1 for all pins on diode mode and no beep on continuity so I'm guessing that one is fine.

Is this the fault here on pq302? Or could the mosfet just be on/off and I don't know it?

Re: Lenovo Ideapad 305-15ibd died and won't turn on.

Okay thank you I will try that!

Re: Lenovo Ideapad 305-15ibd died and won't turn on.

I don’t currently have another adapter to test but it produced the right voltage with a multimeter (around 20V). The centre pin produces a .286 ohm

My adapter is rated for 65W.

I will see if I can get another one to test as it is getting very hot at the tip.

No change removing battery.

PL101 and PL102 both 0.8-1.8V
PQ301 all pins produce between 0.8-1.8. These are all the same as pin 1 and 2 JDCIN1 I’m not sure exactly but could the fault be with the JDCIN1...

So I’ve had this laptop for a couple of years and it had been looking worse for wear recently. Anyway, it finally just stopped working yesterday mid session. It doesn’t power on and there are no lights at all, and the fan doesn’t spin up.

I have taken a look inside and realised I have no idea what I’m doing as I’m a beginner. I’ve tested the DC jack... works fine. Charger delivers 20.6V and that comes through to the jack. I found the schematics for it on this forum but in honesty I don’t know what I’m looking at. I understand the basics...

Re: New Members - please post your introductions here

I’m a budding computer scientist from the United Kingdom and I’m of the belief that you can’t really know a computer if you haven’t taken one (or ten) apart and tinkered with it.. Well, I say that, but I’ve been forced to adopt this philosophy ever since my laptop died on me. Due to a lack of funds and no angel investors in sight I am now on a mission to repair the old girl. That explains why I’m here.