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What does this 8753A Error Message mean please?

Question asked by Timbo2020 on May 18, 2020
Latest reply on May 29, 2020 by Timbo2020

At power on I'm getting this simple, one line message:

"E S@M G@IL!1=PQPQPQPQPQPQPQPG>m"

Pressing "preset" I get an HP logo for two seconds then the message again.

 

I thought it might be a checksum error so I've fitted fresh set of EEPROMS with v1.0 firmware.

 

Same message appears.

 

Does anyone know what the message means please?

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