Originally Posted by
Dishfish
My 9000HD was getting slow to boot. It should show "booting" in a couple of seconds of main power switch turn on. I would switch rx on and wait for 30 sec for it to indicate booting. This became 60 after another month. I noticed the 2 fans that I wired internally would pulse on then off and this would repeat. When they would finally stay on, then the booting indication would display. Finally one day it wouldn't boot.
This is a switching power supply I'm guessing. Once it died I could hear it make a repeating click sound. I disconnected the wire harness header and powered up to see if the mainboard was loading down the supply but there was now no clicking sound and no dc voltages likely because there is a sensing cct. I plugged the header back in and now it would click and I measured a pulsing dc voltage, just like the fans were pulsing. The dc shouldn't be pulsing but it's switching incorrectly. Then I noticed a swollen cap near the front right side of the ps board and it is labelled EC201. It is a 2200uf 10v electrolytic cap.
I pulled the power cord, pulled the ps board out, replaced that one cap and now I'm back up and running. When I searched the problem with google, lots of people had opinions about boot loop blah blah blah. If your voltages aren't there or they are pulsing, and they're marked on the cct board what they should be, try changing this cap even if it isn't swollen, it could still have failed. Remember to power down before pulling the board, and note the electrolytic caps are marked with a minus on one side and that matches the thick black print on the cct board. If you don't already know this, you might want to get help from a buddy that does. And if you're not sure what you're doing in there, call a buddy that does. Current kills! :stop: Good luck :yes: