[comp.sys.cbm] Help! Blank Screen!

dscherer@ihuxp.UUCP (Duwayne Scherer) (11/13/86)

The other day my sister-in-law was using my c64.  While she was
typing in something the screen blanked out on her and has remained
this way since.  When I try to power it up the sreen goes gray and
stays that way.  I'm using a 13" t.v. and the t.v. works fine.  I'm
wondering if maybe my power supply went bad on me.  Any suggestions?

					Duwayne Scherer
					AT&T Bell Labs
					(312) 979-0130
					
					
					

fmb@ihlpa.UUCP (Botelho) (11/15/86)

Duwayne Scherer writes about problem with C64

> typing in something the screen blanked out on her and has remained
> this way since.  When I try to power it up the sreen goes gray and
> stays that way. 
A friend of mine had the same problem with his machine.  We got another
working machine and started switching parts one by one until the
broken machine worked.  It turned out to be a bad ROM chip.  I'm 
not sure where he eventually got another ROM for the bad machine.

After we put the 'good' mahine back together, it still worked!.

jrg@hpirs.UUCP (11/19/86)

The same thing happened to my 64... It turned out to be the PLA chip.
The repair bill was $25.

Jeff Glasson
Hewlett-Packard
{ucbvax,hplabs}!hpda!jrg