Hello, I use a yamaha e433 keyboard which was working perfectly. There was a day the power supply to my home was very low such that it can't even charge a mobile, so my cousin connected wire to the keyboard battery section directly to light without adapter. He said the keyboard flickered for seconds then went dead. Now when connected through adapter to light it just make a hum and does not power on. Same thing with batteries. The keyboard has a fuse on the power board, could it be blown , or the whole power board..please help

SOURCE: regarding battery problem/battery not charging

Hi Jasbir, Laptop batteries only have a set life span and if your battery does not hold charge the only solution is topurchase another battery. You will find the cheapest way to do this is to search the computer section of ebay [laptop assessories ]
and find the battery for your laptop model.
Regards mistyman

SOURCE: Power supply problem

This is going to be with the power management system on the motherboard. These are the classic text book symptoms of a failed power management chip. Few shops will be able to fix this, most just say replace the motherboard, you might get lucky and find one in your area that can fix it, if not then you will need to send it to Acer for repair.

SOURCE: Screen went black

Just a thought... There's a "Fn" Key located beside the Start key, when you press this "FN" key + F5, the screen goes black, and if you press again, the screen goes back to normal... Could this be the problem?

SOURCE: Dell inspiron 2200 green LED battery Indicator flashing

sounds like your charging circuit isn't working or the adapter isn't putting out enough power or amprage to fully charge the battery, or you battery went bad. if the charging circuit is bad then so is *********** board, time to burry the system and buy a new one

SOURCE: Orange light when I charge my MotoRokr E8!

Kevin you must try charging it with the wall-charger, if that doesn't works, try entering BL mode by pressing # and *, and then pull the trigger to turn it on.

It will tell you that battery is low, you can connect then the charger, pull the trigger again, it should start normally.