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hueyjones70

800XL Bad Video Boot

By hueyjones70, in Atari 8-Bit Computers

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hueyjones70
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Working on an 800XL and get a very bad video on boot.  The computer never does a proper boot.  Sometimes I get this screen and sometimes I get no video at all.  I have tested every IC on the board with a working board and I cannot find one that is faulty.  Any ideas of where I should look.  My diagnostic tools consist of a multimeter and a logic probe.

800XL Bad Video.jpg

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