Delta Serverpower 450W Ex (CAA-450BT A) went pop...

[tleu8472]

Delta Serverpower 450W Ex (CAA-450BT A). Was browsing the Web on my Ivy Bridge system when there was a loud pop from the power supply and the system shut down. I do not recall any smoke coming from the unit. I took it apart but there is no sign of damage. I think only the fuse blew. I would like to identify the problem that caused the fuse to blow. Any ideas? It has only been in use for less than two years.

[ben7]

Re: Delta Serverpower 450W Ex (CAA-450BT A) went pop...

Delta Serverpower 450W Ex (CAA-450BT A). Was browsing the Web on my Ivy Bridge system when there was a loud pop from the power supply and the system shut down. I do not recall any smoke coming from the unit. I took it apart but there is no sign of damage. I think only the fuse blew. I would like to identify the problem that caused the fuse to blow. Any ideas? It has only been in use for less than two years.

Check the transistors on the primary side heatsink. (near the two big capacitors)

[senz_90]

Re: Delta Serverpower 450W Ex (CAA-450BT A) went pop...

also some resistor and caps near the transistor. that is more likely failed when transistor is defect.

[PeteS in CA]

Re: Delta Serverpower 450W Ex (CAA-450BT A) went pop...

Maybe check to see if one/both of the MOVs across the big lytics shorted.

[Behemot]

Re: Delta Serverpower 450W Ex (CAA-450BT A) went pop...

…or opened. Don't see any thermistor so you can probably skip it, if there is some, check it as well.