Hii have a panasonic sa-ak240 with no remote or manual ,how do i play all disks ,as it stops after one disk has played.

SOURCE: Games initial load before Play Starts receive error 'cannot read disk see instruction manual'

If this happens for only some games, you should try cleaning the discs with a disc cleaner. Otherwise, you could try asking around at stores like circuit city, radioshack, best buy, etc. for what you could use to clean the lens, the part that reads the disc in your gamecube. If that doesn't work, chances are that the lens is damaged and your only hope is to send it in for repairs or get a new gamecube (or Wii).        

SOURCE: F61 error in my SA-AK25 Panasonic Audio System

CHANGE STK --------IC

SOURCE: Unlock code for Panasonic SA-HT 340

no sorry

SOURCE: How to fix F61 error?

First re solder any dry joints on Transistors Q502, 504, 507, 515 & CN500, IC501. If there are no dry joins replace IC501 (STK470-0??) & maybe D501 (16.V) zener

SOURCE: can't play iPod on my panasonic sa-en27 with out a remote

I ran into the same issue, instead of buying a replacement remote I was able to dial in a Vip 211 dish network remote control with remote code 643 in AUX setting. Then once the code was in, i pressed the 6 key on the remote and now I can listen to audio on the music port. The 643 code refers to the first Panasonic amplifier/receiver in the code list. To further clarify, I pressed AUX for 4 seconds, pressed 2 to signal I am programming an amplifier/receiver device, then punched in 643 then pound sign.
Good luck with yours.