Re: Toshiba C650M (PSC2EC-00M001) wont't power on or charge. How do I troubleshoot?

I appreciate your help, any thoughts on the latest measurements?

How can I tell if the voltages I got from the TI chip are within spec or not?

Re: Toshiba C650M (PSC2EC-00M001) wont't power on or charge. How do I troubleshoot?



With AC and Battery disconnected:

Resistance between 1 and ground isn't stable at first but eventually settles at 71.2k Ohms
Resistance between 1 and 2 is about 1.5 Ohm (if I can trust my cheap multimeter to be that accurate)

Not sure which pins are +, -, and ground on the battery connector so didn't measure that....

Re: Toshiba C650M (PSC2EC-00M001) wont't power on or charge. How do I troubleshoot?



Alright, here goes:

[CODE]
(measured without the battery plugged in, and with AC plugged in)
1: 6.80V
2: between 7.95 and 8.02V
3: 6.00 to 6.80V, unstable
4: 7.97V
5: 0.03V

6: 2.65V
7: 0.00V
8: went from 0.10V to 0.00V while measuring
9: 0.04V
10: 0.00V

11: 1.07V
12: 1.05V
13: 1.05V
14: 0.00V
15: 0.00V

16: 6.03V
17: 5.86V
18: 1.05V...

Re: Toshiba C650M (PSC2EC-00M001) wont't power on or charge. How do I troubleshoot?


I hope I have the right one, but the U6000 marking doesn't have any chip right next to it. This one is a bit to the left of the marking, and it's very small:
BQ725
TI 12K
A703...

The AC adapter is good, it spits out 19.15V when plugged in (checked at the connector that goes from the jack to the motherboard, so the connector and its cable are good)

The fuses marked F6000 and F6100 are good too, 19V on both sides from ground, and continuity is ok across them.

CR2032 battery reads 3.10V

Unfortunately I am not that knowledgeable about electronics and that's about all I know to check. There are several pads exposed around the motherboard which I assume are for testing but I can't find a reference as to what readings are expected...

Re: New Members - please post your introductions here

Hi all, I'm trying to fix a broken laptop that won't boot. Not sure if it's caps related or not yet.