From: MagerValp (MagerValp_at_cling.gu.se)
Date: 2005-12-07 00:54:21
>>>>> "R" == RolfMiller <RolfMiller@aol.com> writes: R> << black screen on power up C64. >> R> At various times I have found all of the following chips to cause R> black screen on C64 power up. 6510, one of the 6526 (can't recall R> which), 6581, 6567, PLA (8SQ2S100 or 906114) -- my first pick, & R> 901226, 901227. Rolf Thanks, though I should probably clarify: I don't get any video at all. My projector doesn't try to sync, and the 1901 doesn't react. With a dead PLA or kernal ROM I should be getting a blank, black VIC screen. I've ruled out the VIC and SID chips, since something is sinking the 9 VAC to a fluctuating 2 VAC, and removing them didn't change anything. Could a dead 6526 cause the 9 VAC to go wonky? -- ___ . . . . . + . . o _|___|_ + . + . + . Per Olofsson, arkadspelare o-o . . . o + MagerValp@cling.gu.se - + + . http://www.cling.gu.se/~cl3polof/ Message was sent through the cbm-hackers mailing list
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