Track n Field screen garbage

Player

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Hi all.

Could anyone give me any pointers on where to start with this please? Im assuming because stuffs actually being drawn to the screen it shouldn't be a big job. I did the old ROM pull and re seat. Any suggestions would be much appreciated. It's my mates and he's coming down on Monday so would be great if I could get it sorted :)

Cheers

John

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TheDaddy

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Normally the ram on the bottom board , Next to the program roms. 6116 type ram. First make sure you have removed and cleaned all socket chips & checked the voltages.

Hope this helps,

Dave.
 

Player

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ok so voltage was 4.8v. I kept turning it up and stopped at 5.4v. The RAM is soldered on the board. Next job will be to check the RAM.

Cheers
 

TheDaddy

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5.2 your max realy mate , you removed and cleaned the roms next to the ram first ? If you can verify them. Have you a 6116 you can piggy back with ?

Dave.
 
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