What's your read on this? No power button lights with 1.6 unit

[mugglesby]

I think this is just a "replace the power supply" issue (DPSN-96DP), but I'd appreciate anyone's insight if they have advice:

(Video of issue)

https://imgur.com/INZWEUK

 

Summary -- push power, no LED ring lights, X3 mod chip front indicator panel briefly lights up, then turns off.  Eject button has same result.  Case fan briefly twitches when power/eject is pressed.  Continuously holding the power button 'on' keeps the lights on the X3 front panel lit, and the hard drive can be heard spinning up, but then nothing appears and it powers back off after release.

Removed the motherboard, examined the traces to see if there was any rot -- looks really, really clean, nothing was visible after several minutes of inspecting.

(Shot of a section of board)

https://imgur.com/HIuVLGm

 

CPU capacitors look a little sussy and puffed, I should replace, but nothing leaking onto the board.  Clock capacitor looks good, too, but I think I should replace that as well.

(CPU caps)

https://imgur.com/NR7H58m

(Clock cap)

https://imgur.com/pFDgFPA

Probably will get capacitors from Console5, I have enjoyed ordering from them before.

 

Should I just replace the power supply?  Is that what this issue looks like?

https://imgur.com/FVbfgB6

(Delta power supply)

 

Thanks anyone that feels like replying!  This is my daily driver, I'd like to have it back!

[KaosEngineer]

Replace all 5 of the 3300 microFarad 6.3Vdc low ESR caps by the CPU heatsink and power supply connector.

[mugglesby]

On 8/22/2023 at 10:10 PM, KaosEngineer said:

Replace all 5 of the 3300 microFarad 6.3Vdc low ESR caps by the CPU heatsink and power supply connector.

Right on, thank you, I appreciate the reply!

I will order up a cap replacement set from Console5 or similar — this doesn’t read like a total PSU failure to you, then?  Maybe because some power appears to be traveling, as evidenced by the X3 mod chip front panel and the hard drive being heard to spin up?

Thanks again! 

[Marty]

39 minutes ago, mugglesby said:

this doesn’t read like a total PSU failure to you, then?

This is very typical of "bad caps".

Swap them out and you'll be fine.

[Bowlsnapper]

5 hours ago, Marty said:

This is very typical of "bad caps".

Swap them out and you'll be fine.

It's certainly not a BAD idea to do so at all. but the jury is still  out on whether or not he will be "fine."

[mugglesby]

Thanks, everyone!  Caps seem a good place to start, especially considering how the ones near the CPU heatsink appear.  Cheaper than a power supply, and can always do the PSU next if that doesn't work.

Ordered up the caps from Console5, and I will replace the heatsink paste, clock cap, and do some general cleanup while I am in there.  Maybe add the SSD that I always meant to do.

I'll update once repaired!  

[Bowlsnapper]

31 minutes ago, mugglesby said:

Thanks, everyone!  Caps seem a good place to start, especially considering how the ones near the CPU heatsink appear.  Cheaper than a power supply, and can always do the PSU next if that doesn't work.

Ordered up the caps from Console5, and I will replace the heatsink paste, clock cap, and do some general cleanup while I am in there.  Maybe add the SSD that I always meant to do.

I'll update once repaired!  

Old caps, especially on the PSU and big ones that handle high power are always good to replace and are a cheap place to start!