Palatine, IL
"This is what is printed on the top of it
F6820
7813
SINGAPORE"
That is a 6820. The F stands for Fairchild the manufacturer
7813 is the year and week the chip was made.
SINGAPORE is where you go to get laid in asia.
(Topic ID: 209402)
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Bally, 1980
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1 week later
The display has power so that is good. Take the display out and reflow all the solder connections. Could be a simple as a bad display enable connection.
Quench is correct about checking the resistors. Do you at least have the orange glow from the bottom of the display? That is from the keep alive. If that is dead you could have a bad panel.
The display is completely blank but has keep alive glow you are looking for a main component failure. I would suspect the U1 chip. However start with the basics paying close attention to pin 15 and 10 of the connector.
1 week later
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