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DC7800 Ultra-slim desktop 4 beeps

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DC7800 ultra slim desktop
Good afternoon, please help solve the problem. I have an old one. He worked faithfully and grandmothers, playing solitaire and other card games. Recently, it does not turn on. Green lights come on, then 4 beeps with a red light coming on. In the service manual I read that I need to replace the external power supply. Will it help?

"Power supply overload failure Blinks red 4 times @ I Hz [1] 4 Check system board problem


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No one can say for sure.


You have a 50-50 chance of it being the external power supply or the system board.


You can probably pick up a used but tested and working power supply on eBay for a low cost.


Hopefully, that is all it is.

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