Do an ESR test on all the capacitors in the supply. There is a good chance
you will find a number of them to be too high in their ESR rating.

--

Jerry G.
=====

"Ruediger" wrote in message
...
Hello,

my Acer Travelmate 220 has a small problem.. or a big one to be precise:
The internal power supply unit ( y'know, 19V to 3.3, 5 and 9 V ) ticks and
collapses after 5 seconds when trying to power up the notebook. Putting the
Accu in in collapses immideatly.

Aside from a badly soldered BC37 everything looks ok, and the SMD
transistors are okay afais.
Help and input welcome

--
Sincerely

Ruediger