{"id":10872,"date":"2026-03-01T12:31:05","date_gmt":"2026-03-01T11:31:05","guid":{"rendered":"https:\/\/retrofixer.it\/?p=10872"},"modified":"2026-03-01T12:49:40","modified_gmt":"2026-03-01T11:49:40","slug":"riparazione-commdore-64-con-supporti-case","status":"publish","type":"post","link":"https:\/\/retrofixer.it\/en\/riparazione-commdore-64-con-supporti-case\/","title":{"rendered":"Repairing a Commodore 64 with case mounts"},"content":{"rendered":"
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I was recently given a Commodore 64 by Stefan, whom I thank once again. This historic home computer from the \u201980s, which left its mark on an entire generation, was my first computer until 1994. After that I jumped straight to IBM PCs already running Windows 95, quite a quantum leap, as Sinclair would say.<\/p>

Let’s get back to the computer and see whether it works and what needs doing.<\/p>

\ud83d\udd0d First power-on and initial diagnosis<\/h3>

The first thing I did was connect the C64 to the TV<\/strong> and switch it on, hoping to see the classic BASIC prompt.
Unfortunately, although the power LED lit up, no valid image appeared on the screen<\/strong>. This is one of the most common symptoms in old Commodores: the computer often seems \u201calive\u201d but produces no video signal, leaving the screen completely black.
Actually, it does produce a video signal, but an empty one: if there were no video signal we’d notice from the TV not locking on to or recognising the signal.<\/p>

\ud83d\udd0e What I tested<\/h3>

To establish the source of the problem I followed these steps:<\/p>