What causes laptop instability?

Question

Iron

Laptop Dell inspirion 7567. It can lie without turning on for two days, then work for twenty minutes or a couple of hours, after which it turns off for another couple of days. I tried to turn it on from the mains, from the battery, clamped the power button for 15 seconds. as recommended by Dell, but nothing helped. The previous time it turned off after connecting the Z.U.
I spilled liquid about 3 months ago, I thought the problem was this, I completely disassembled and cleaned it, there are no traces of burning on the motherboard, just a little dirt on the touchpad and the power button (I completely cleaned it and replaced the rusting cable).
There is a single indicator on the case, when the mains power is connected, it lights up and sometimes blinks, when you press the power button, the indicator goes out for a second (during inoperability, and working exclusively from the battery, the indicator does not light).

Answer 1

There is a single indicator on the case, when the mains power is connected, it lights up and sometimes blinks, when you press the power button, the indicator goes out for a second (during inoperability, and working exclusively from the battery, the indicator does not light).

If I'm not mistaken it could be a battery issue. Try replacing.
And it's also possible that the power inverter is going crazy.
In general, it is better to send it in for repair.

Answer 2

Believe me, if you are not engaged in electronics repair, then you will not see anything. Often you have to work with a microscope. And the problem is 99.9% related to flooding. I strongly recommend not to try to turn on the laptop and remove the battery. And in this form, take it to an adequate service center and put everything in order. There is nothing wrong with that, everything is being repaired and will work like new.