I recently did a repair of Duo Dock which had the "click of death", as it made clicking noises when plugged in. The main culprit is the PSU, where few electrolytic caps dry up or leak, and the PSU won't start.
The PSU is riveted together, so you must drill out the rivets to gain access.
Someone suggested replacing the C28 or something, but I found more dead caps by measuring ESR, also there was one leaking SMD cap, which is easy to overlook. I needed to desolder one of the filter caps to gain access. These filter caps looked good, and also measured okay, so I left them in.
After replacing all of these caps, the Duo Dock now runs fine.
For reference, I drew up a diagram of the caps I replaced.
The PSU is riveted together, so you must drill out the rivets to gain access.
Someone suggested replacing the C28 or something, but I found more dead caps by measuring ESR, also there was one leaking SMD cap, which is easy to overlook. I needed to desolder one of the filter caps to gain access. These filter caps looked good, and also measured okay, so I left them in.
After replacing all of these caps, the Duo Dock now runs fine.
For reference, I drew up a diagram of the caps I replaced.