"Angus Thomson" wrote in message
...
Hi

I recently aquired an old(ish) Tektronix digital scope which is faulty and
does not start up; instead, the power turns on for 1/2 of a second then
off
for 1/2 a second and a 'clicking' noise comes from the unit (this process
repeats). I take it this is a faulty power supply, possibly tripping out
due
to excessive current being drawn. I have heard this problem has occured on
other Tektronix scopes; has anyone had any experince of this fault, and if
so, where exactly does the problem lie?!

Thanks!

Angus Thomson

In general, anywhere.
Look for shorted tantalum caps.
If possible, disconnect subassemblies.