It works on the battery in the BIOS setup mode or even on the windows Safe mode, but the moment the OS is loaded it shuts off on battery. Took my laptop to a local repair shop, they reinstalled the OS. But realized that with new battery too the same problem remained. I thought the it was some problem with the battery, hence got a new one. On AC power it works fine, but the moment the AC power is switched off, the laptop will run for a few minutes (random time, but less than 10-12 mins) and shut down without any warning etc. when my laptop will run on AC power but will abruptly shut down on battery. I have acer aspire 4736z laptop and I have exactly the "opposite" problem as yours. I thought about relaing the wires to where the battery plugs into the motherboard but I can't do this as for some reason the voltage is different (ac = 19v and the battery is only between 3 and 4 volts.) It can't be a heating problem because there is no dust left on the heatsinks/in the fan, the fan is spinning and the problem only occurs when you boot the laptop with the powercable plugged in.Īny ideas on what it might be? which parts on the motherboard would I have to look at? I've checked the voltage on the motherboard where the power from the ac comes in to but this all seems fine. I've taken apart the whole laptop and looked for broken resistors etc and found one which has been replaced now. It looked like I had a bad AC but I've tried 2 other ac's from friend who use the same laptops but neither of them works. In short, the laptop works with just a battery but doesn't work if you have the battery and ac plugged in and doesn't work when just the ac is plugged in.
This process will repeat it self until you take the AC adapter out, then it will stay off.
If you wait a few seconds the laptop automatically turns itself on again but cuts out again when you see the windows logo for the first time. When I boot up the laptop on just the battery it boots up fine and I can do whatever I want but as soon is I plug in the AC it cuts out (dead without a warning or following the shutdown process). I've got a similar problem for my laptop (acer aspire 8930g)
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