Posted By
TLC
on 2007-04-21
15:51:39
|  Re: @ characters on screen upon bootup
Does the problem show up if the machine is switched on "alone" (no drive, just the machine itself plus the TV)?
Such problem is usually a sign of a bad FPLA or a ram chip. If you have a spare Plus/4 or C16, try swapping u19 (or what looks even better: pick u19 and test it in a known-to-work computer). Unfortunately, testing a ram chip is not all that easy, due to the fact that they're soldered in (but until you would have to do that, you can test a lot of chips nevertheless).
I've never tested a 1551 on an NTSC machine (so if the problem only appears if the 1551 is connected, JamesC might have a point here).
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