Blue screen no signal
You need to replace the surface mounted voltage regulator IC (small black square chip with a metal tab on one end, and two legs on the other end.) it is on the main board, right behind the signal input board. It's a BA09FP regulator IC, you can purchase this on mouser.com
it requires a bit of disassembly, but it is relatively easy to do. it is component number IC9C25. It could be bad, or just have bad connections . This IC supplies 9 volts to the terminal board. Try resolding it first.
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