[W520] Does not start on battery only, doesnt shut down or sleep

Hi all,
I have quite a huge problem after flooding my W520 with tea. Obviously immediately after spilling it I flipped the machine, unplugged ac, took out the battery. Few days after laptop didnt start so I had it serviced. The keyboard was changed and whole interior was cleaned. At home I tried to power on the laptop (with battery only) but with no reaction, then plugged ac and computer started itself (I didnt press the power button). When it starts it is possible to unplug the ac, and it works on battery.
Second problem is that the machine doesnt want to powerr off or sleep. It shuts down for 2-3 second then automatically starts (both on ac and when already started with battery). To shut down I have to take out the battery and ac. (Tried all possible stuff, WOL, Always on mode and so on but nothing works) ;/
Called the service with explanation but nobody seemed to know how to fix it. If you have any ideas that could solve the problem please help...

Hi,
Welcome to Lenovo Community Forums!
I’m sorry to hear that you spilled tea in your Lenovo ThinkPad W520 and you are facing multiple issues with the system.
I would suggest you to perform Flee Power – remove the battery and any other peripheral device connected to the computer. Hold the power button for 10-15 seconds and then connect the AC Adapter and battery and try to turn ON the computer.
I would suggest you to update BIOS to the latest version, try swapping with a good known AC adapter and battery.
Basically there's 3 power sources for the motherboard ac adapter, laptop battery and CMOS battery. If either of them goes bad or is malfunctioning you might experience strange behavior. If you have confirmed the functionality of the above said, it probably points to a system board failure.
Regards,
Mithun.
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[W520] Does not start on battery only, doesnt shut down or sleep

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