Posts Tagged ‘PSU’

GCOD – Green Circle of Death – Humax FoxSAT-HD STB PSU Repair

Tuesday, September 6th, 2011

from an earlier post….

“But this has some good news, because I managed to salvage a 3300uF 16v Capacitor from this broken power supply to repair the power supply in my Humax FoxSAT-HD STB!”

It would appear that Humax have used rubbish cheap Foxcon capacitors in the STB, and after 24 months, it will stop working with the “GCOD – Green Circle of Death”, when if you turn on your STB, it will just sit there, with green leds rotating in a  circle, The fix is to replace

C23 – 680 uF  25 volts (this is the 12v line to the LNB)

C12 – 2200uF 10 volts

as a quick fix, I’ve just replaced C12, with a 3300uF 16v cap, and I now have a working STB, but I’ve got some Panasonic Caps, on order from Boot Ferrule Man.

Replace these CAPs
Replace these CAPs

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It’s a very quick fix, if you can use a soldering iron and solder sucker!

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BIG BANG – PC Workstation power supply!

Monday, September 5th, 2011

And on occasion, I have to deal with the physical world of computing, when the power supply in PC Workstation No.2 decided to go bang, and then tripped the circuit breaker for the sockets in the house! (the computer was not even powered up, but it has a smart power supply, Wake on LAN, low power etc so although plugged into AC, it’s “on”.)

I’ve been disassembling the PC Workstation No.2, little service vacuum out the dust from heatsinks, fans, hard drives, and replacing the PSU with a new working supply from the spares cupboard.

Checking the broken power supply to check which side of the power supply decided to go bang, (AC or DC) fuse had not blown inside the power supply, but here are the photographs from the broken power supply. I think you’ll see the fault immediately.

Capacitor cap blown-out

Capacitor cap blown-out

Capacitor cap blown!
lots of black carbon
Transistor cracked and blow

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But this has some good news, because I managed to salvage a 3300uF 16v Capacitor from this broken power supply to repair the power supply in my Humax FoxSAT-HD STB! (but that’s another blog!)

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