Author Topic: PSU voltage question (Read 1146 times)

Vijay · « **on:** May 08, 2021, 11:52:18 AM »

Got a PSU for an old laptop that threw me. The laptop wouldn't turn on , so I measured the voltage out of the PUS and it was correct at 20v, but when plugged into the laptop, it drops to 3v. Any idea why that has happened and can the PSU be easily fixed?

The laptop works fine with my benchtop PSU, so it's definitely the laptop PSU at fault.

Cheers

Vijay

oakwoodtv · « **Reply #1 on:** May 09, 2021, 09:47:19 AM »

The most likely fault is the capacitors in the psu check for any that are
bulging on the top and replace.

Vijay · « **Reply #2 on:** May 09, 2021, 12:09:10 PM »

Cheers Richard

May have to cut it open, no screws on it

countrypaul · « **Reply #3 on:** May 10, 2021, 12:08:18 PM »

Have you checked underneath the labels?

Vijay · « **Reply #4 on:** May 10, 2021, 06:22:58 PM »

Yep, no screws. I managed to get it open, it was just glued together...................

Biopowered - vegetable oil and biodiesel forum

General

Chatter

PSU voltage question