I've been doing this for now 35 years (started with an Apple II and a 8088 based PC XT) and have always had success building / upgrading / repairing computers, as it's part of my daily job.

And as I already stated, it no longer has a main battery. The computer was of course completely disconnected from mains when I did this. The old battery had gone down to 0,7 volts. This to emphasize the fact that the service manual is incomplete. keyboard removal, and a couple of screws that are not even mentioned in the manual had also to be removed. I just used the procedure that most closely approached the goal, i.e.

I do have the service manual and unfortunately it has no mention of the CMOS battery replacement procedure. I do have a bandwrist attached to ground when I work. This means that the CPU is not impacted and seems to be doing something during the first 30 seconds of the startup process.ĭoes anybody know the error codes or signs for this specific brand or model ?ĭoes anybody have any hint on what could go have gone wrong, apart from incorrectly reconnected connectors ? > Nothing happens, the laptop shuts down after 3 seconds. Re-seating GPU MXM card and CPU (replacing thermal paste) and heat sinks. I removed all integrated peripherals (HDD, DVD, only left only one 4Gb ram stick. T+75s : Laptop shuts down (after 48 blinks of the lock leds. T+30s : The GPU fan goes to full speed, power light and bluetooth stay on, but caps lock, num lock and scroll lock start blinking a t about 1 Hz. T+0 : The GPU fan starts spinning normally, power light lights green), bluetooth light is on. On pressing the power button this is what happens : Unlike regular laptops, the battery is a simple CR2032 lithium battery that seats in a battery holder.Īfter I changed the battery and reconnected and double checked everything, the laptop won't boot anymore. My laptop's battery has been dead for quite a while, so I run the laptop only on mains.įor quite some time I've had to set the correct date and time and enter setup at each reboot, so I decided to change the BIOS battery.

Computer cmos battery