i have COMPAQ S7500 monitor. The shorted HOT 2SC5387 replaced with BU2527AF. After warm up it works about 20 seconds and then the picture is going narrow. After one second picture disappears. In few seconds periods the picture appears for a short while and then it is again narrowing and disappearing. This 1MB video shows what is happening 20sec after warmup:



Is it due to bad HOT replacement, or
something other is bad?
Thanks

Problem solved...

Ok what was the cause?.

Rich

Now the problem is there again. I replaced c444 (100uF 25V)
somewhere in HOT base drive circuit. The monitor worked about 20 or 30 minutes. Then the same problem.

Whoose chassis is this can I have the Compa PExxxx number or the UL reg No begins "E" and six digits after.

Rich

it is PE1164T .