Flickering screen when battery powered

the flicker will be the pc you have a low voltage on the hdmi board were by the voltage is up and down causing the flicker. could be a low volt on the psu or in the graphics card itself. graphics cards use a lot of power. could just need removing and given a good clean.

The power supply adapter may not be delivering enough power when you run it and trying to charge the battery at the same time. The only way to find out is sub another power supply.

how old is your laptop?

The screen flickering could be the screen inverter starting to fail. The inverter sits under the screen behind the bezel, it takes the low voltage DC power from the power adapter and converts it to high voltage for the screens backlight. If the inverter starts to fail, you either get a dim display that finally goes dark or get flickering like you see in some store lighting fixtures when the flourescent bulbs are failing.

It sounds like the mouse goes on standby to conserve battery power, or the batteries are getting low. It's more likely it goes into a low power mode to extend battery life and conserve power.

install windows again

may be its ur power key problem.

If the light is flickering and not just becoming brighter or dimmer with engine rpm, I'd suspect an electrical short, possibly between the battery and alternator or inside the alternator itself. have the alternator output checked before going further with diagnosis and before it fails completely and becomes more difficult to diagnose.

try another battery and if the lights just blink briefly....your main-board sounds like it is damaged so you may need a new one.

sounds like your ac plug to the laptop might be loose you can try ans see if you can resolder it back. the other problem is your ac cord might be broken wiggle it around see if the light flickers.