The restoration of a 1980's Williams Defender arcade machine
Defender Repair Logs
Massive Williams Defender Repair Log
http://www.retrocomputermuseum.co.uk/forum/index.php?topic=4703.0
Note: The images are now broken on the above link, so I have a PDF version stored here for future references
Trying to burn decoder EPROM replacements
http://forums.arcade-museum.com/archive/index.php/t-290979.html
Using 4164 RAM
http://www.robotron-2084.co.uk/techwilliams4164.html
Williams Decoder ROM replacements
http://arcadecontrols.com/BBBB/decoder.html
The Ranger Chronicles (Williams Game Board Repairs)
Stef van Dijk’s repair logs for Robotron, Joust and other Williams boards
Aussie Arcade’s Great Defender Repair Log
GameDude’s repair log of a troublesome Defender which I have also stored here in PDF form just in case it ever disappears!
http://wiki.aussiearcade.com.au/index.php/PCB_Repair_Logs_Defender