Blank screen syndrome experienced by early C64

Welcome back to our Commodore Discussion forum. If you have a question, comment, problem, or just want to chat about Commodore, post it here for free.

Have some fun and talk to others interested in the Old and New Commodore world.

Moderators: wiskow, Trazan

Post Reply
TangentDelta
Posts: 4
Joined: Tue Jan 04, 2011 5:01 pm
Are you a real person?: No... I am a spambot, delete my account!

Blank screen syndrome experienced by early C64

Post by TangentDelta »

I have been working on my faulty C64 and it appears that something on the board is shorting out. I went over all of the chips with an oscilloscope, and on startup, it resets the chips but then locks up when trying to read the ROM. The five volt regulator after a minute, gets incredibly hot. So hot that I cannot touch it, or I will get burned. I'm hoping that it will just be a simple fix of scraping away some corrosion, and not having to replace an entire chip. If the five volt regulator is faulty, I can get another one.
User avatar
rbernardo
Posts: 3246
Joined: Fri Jun 09, 2006 8:00 pm
Are you a real person?: No... I am a spambot, delete my account!
Location: Visalia, California, USA
Contact:

Re: Blank screen syndrome experienced by early C64

Post by rbernardo »

TangentDelta wrote:The five volt regulator after a minute, gets incredibly hot. So hot that I cannot touch it, or I will get burned.
That isn't right; it shouldn't get that hot.

FCUG celebrating 30 years,
________________
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
Post Reply