28S Advice Needed

[twoweims]

(06-19-2021 06:08 PM)C.Ret Wrote:  Hello,

Normally during the [ON][ < ] loops indefinitely beeping and displaying active pixels animation and printing 200000 30000 400000 repeatedly on the printer.

This is exactly what happens.

(06-19-2021 06:08 PM)C.Ret Wrote:  If it stop on an error, at least a chance a bit is still alive !

It does not stop on the error. It displays "2 Fail" and then repeats the test.

(06-19-2021 06:08 PM)C.Ret Wrote:  I suppose you adjust contrast by pressing simultaneously [ON][ +] or [ON][ - ] ?

Yes. And this does adjust the screen contrast.

(06-19-2021 06:08 PM)C.Ret Wrote:  Did you try any soft system restart using [ON][ ^] or the high ends total reset [ON][INS][ > ] ?

Yes. I tried both of them.

My question is , What does the "2 Fail" message indicate, specifically?
The manual just says if there is a number followed by "Fail" that I should send it in for service. Obviously, this is no longer possible.

I will try to disassemble and repair if "2 Fail" indicates something that can actually be repaired.