Lenovo ideapad 100s-111by won't power on.

SOURCE: screen stays black green light comes on for a few seconds.

This sounds like you have "bricked" your psp... there are a few things that can cause this: first would be that you have bricked it trying to install Custom Firmware, another would be that the battery died or it was shut off during an update. You can buy what is called a Pandora Battery and a "magic" memory stick which will reset your PSPs firmware to the original 1.5, or if you still have warranty you can send it in to Sony to get fixed. Pandora batteries and Magic Memory Sticks are sold in a package for about $10-15 on the internet. Good Luck, hope you fix it.
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SOURCE: monitor goes black 1 second after coming to full screen

Same problem here. Does anybody have an answer?

SOURCE: my lenovo Y510 ideapad turns on but the screen

The next tim eit is turned on, try shiniing a bright flashlight directly on the screen.

If you can see anything there then the backlight has burned out on the screen, and will need to be replaced.

If you cant see anything, try hooking up an external monitor to the laptop, if you have a desktop the monitor for it will work for the test..

If the external monitor you hook up will work, then you will have to replace the screen..

( or at a minimum the inverter board, or check that the cables are tight that go to the screen)

SOURCE: Lenovo Ideapad Y510 won't turn on or off

try removing the battery and removing the adaptor press and hold down the power button for 5-10 seconds then let got this will power drain your system board noy turn the system on using the battery only without any adaptors to charge or power the system, try turning the system on if the system turnes on leave it turned on for a couple of hours then conenct your sysem adaptor monitor if the battery light and the battery indicator on the lower right of the screen in windows woll indicate that the system is chargin if it is then I believe everything should be fine the blue indicator is for your system if it is blue then your system is turned on and has power if it turned orange and blnking then the battery will be more likely be almost out of juice or may need charging.

SOURCE: Lenovo Ideapad Z570: Battery indicator shows the Power is plugged in & charging. But the Battery charge percentage doesn't increase. How to fix this?

The battery might be nearing the end of it's useful life and needs to be replaced. The battery only lasts for so long then it has to be replaced.

Buy a battery on ebay base on your computer's Make and model, not the model of the battery.