Korg Music - Page 6 - Recent Questions, Troubleshooting & Support

if it's the old analog version, there should be a tuning knob in the group of controls on the left hand side by the drawbars.

It is inside the unit. You will need to open it up. The battery is flat like a quarter. Sometimes it is inserted under a cover. Look carefully, you will find it.

The pa800 has a fixed amount of Ram at 64mbs and it is not physically possible to upgrade the Ram. The pa2x has a removable128mbs Module and that can be upgraded via a 256mb Module from Korg.
Keith [mrniceneasy - KorgForums]

normally good policy is to replace any faulty plug in socket and the jack lead on sound equipment gaffer tapping the power input plug wont help much anything pushed... is no good note that severe feed back has a good chance of blowing the device

try resetting it to its factory setting,

Yes, just the same cmos battery the desktop computer use. easy to replace, located on the main control board.

Your best answer would come from Korg. Itself. Here's the link- http://www.korg.com/us/support/contact

hot connections indicate a short or bad connection ( like an arc welder ) loose wires or solder dry joint or broken wires creating a high resistance and heat in this area

If you have electronic expeerience, take it to a repair shop. You can cause more damage okiong around if you don't know what you're doing. Past that, contact Korg customer service for the schematic and parts list. The part should be available from Korg directly of from Mouser http://www.korg.com/us/support/contact Korg Parts Parts Is Parts Guitar Parts Amplifier Parts Korg Keyboard Parts Mouser Electronics Electronic Components Distributor Korg Full Compass