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Products => Test Equipment => Topic started by: shingabiss on July 16, 2021, 06:55:08 pm

Title: Tektronix 540A No Graticule or Text on Screen
Post by: shingabiss on July 16, 2021, 06:55:08 pm
Scope has been re capped, board washed.  All PS voltages correct.


Hooked up VGA monitor, same as CRT.  The dip sw is set for all zeros; right side of rocker switches depressed.  Seven segment display first diplays ".L" then segments A and F alternately blinking at about 2Hz.  Display never stops this but gets a little faster.  It seems it never finishes the boot process

Any ideas? 

Thanks.