Hey guys I have the same problem (but charges most of the time since I double/triple checked it) but my only solution (may be yours as well)
is that you guys need to get a new battery. The old battery that came with the laptop I bought 3 years ago (almost exactly 4th year this coming summer) is too old and probably the connection from battery to laptop has worn out and is too loose to stay together as a firm connection.
Get that new battery, its your only choice or your A200 AH-6 will be a desktop soon lol, it's not a good laptop anymore, give it to your kids or neph/nieces.
(mine still works and charges, if you touch the battery or any slight movement that impacts the battery, it'll turn off)