First of all, a big thanks to all Concerned

i have a Dell E172fpb which was powering up OK, but had a black screen,
but had an image on screen when a light was shone at it,
removed Q759 and Q760 [one of which was short circuit]
but decided on changing all 4 transistors [cost me £3-60 for 12

tested monitor, only to find power button and screen both flashed
about once a second.
checked all 4 transistors while in circuit, but where still OK
so continued to read past...
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