I have an odd, hopefully not fatal problem affecting a clients' Inspiron 1525. To start with, the thing had a knackered mobo, and battery - nothing whatsoever. So I picked up another 1525 with a broken screen but working mobo. After fitting this into the chassis of the client machine, and expecting the job to be done, I was surprised to find the thing didn't power on at all. Ok, so...
1. I tested the power supply (an OEM Dell unit, that came with the working mobo), that was fine.
2. I swapped out the memory. Nothing.
3. I swapped and checked/cleaned the little power button switch board and ribbon cable.. Nope.
4. I tested the power jack. Ok. No signs of cracked or dry solder - everything looked & tested good.
5. I then removed and replaced the Cmos battery..and voila! when I plugged it in up it fired!! But without me pushing the power button?!?!
The power button does not turn off the laptop when pushed...? Ok, so I unplugged it from the mains and plugged it in again and...nothing..?? No sign of power..If I swap out the Cmos battery it fires up, but nothing from the power button/switch. I have since tried the other power button/switch board again, but to no avail.. I completely removed the Cmos battery and it fired up, and with a hard drive, it loaded and ran windoze happily! But this isn't any good for my client ;) kinda bad as well as the only way of powering down is to pull the power completely and suddenly, which isn't very nice for hard drives, or anything really...Oh BTW, I did all of this without a battery on the thing, that shouldn't matter should it?
I've spent 10+ bloomin' hours online trying to find a solution for this, but all the ideas came to nowt..and it seems that these Dells are prone to power issues, mainly to do with PSUs. There are complaints about the frequency that users have to replace their Cmos batteries, but I couldn't find squat about anything like my problem.
I've a bad, bad, bad feeling that the mobo is banjaxed..! Please say it's not true, please.. :'(
Please help a fellow tech in his hour of need....
Edited by Feril_Android, 28 January 2013 - 04:52 AM.