Acer Travelmate 220 / Falcon M3 Mainboard - Onboard Voltage regulators chirp only

Hello,

my Acer Travelmate 220 has a defective PSU, it ticks, th "Battery charging" led flickers and the system does not start. As the external brick-PSU is intact, my problem refers to the internal voltage regulators, which are set-up like little switching PSU's, one for every Voltage ( 5V and 3.3V ) Where to start checking, what to watch out?

Any help welcome.

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Sincerely

Ruediger
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Ruediger
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