Will not play any discs at all, just get 'Disc read error':
Problem: If no mod chip installation has been attempted then as above.
If someone has attempted to fit a mod chip then check for damaged components,
tracks and stray solder or component pins being shorted by excess solder.
Remove excess solder with some solder wick.
CD draw will not open :
Could be a few reasons for this. If it's been dropped, the cogs could be misaligned,
you will need to take the CD unit apart and reassemble correctly. If someone has attempted to fit a mod chip there could be damage around the part of the board
where the wires for pins 5 & 6 are soldered. Check for damage to tracks and
excess solder, it is also possible that the BA8510 or BA8515 chip has been damaged. Also it could be the flat flexible cable that connects the power/reset & eject buttons
to the main board.
Check for physical damage and replace if need be.
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