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counter problem


 

A while ago, I found, at a ham swap, a TM500 DC5030A counter., SN B011601, visually good condition, but, on being powered shows what, for me, is an odd fault.
With or no input, digits on te right side show the number 224 with no change regardless the settings of the controls
At the same time, the digits on the left side glow very faintly
The decimal point can be shifted and all the digits glow well when pressing Reset. Besides that there is no response to the controls or
input and the manual offers no clues.
Any ideas as to the cause of ths fault ?

Thanks in advance

Jose Orgnero VE7LBI

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