Hi,
I recently acquired a second hand SGI Octane Cherokee PSU, and while it does power on and 'work' in the workstation, it makes a rather disturbing noise. I wouldn't call it coil whine, it's more like a warbling electrical noise. The noise is from a specific area on the PSU but before I open the PSU and void the sellers warranty, I thought I'd put up a post to see if anybody has come across this before or has any ideas?
I'm quite happy to replace bad caps etc but if it's something that is likely to cost more than say £25 then I might as well return the unit for a refund. My only issue is these are becoming quite rare and hence resellers sell them for £££ hence the desire to troubleshoot and fix. (I also don't like filling rubbish dumps with electrical waste!)
The PSU has an SGI part number of 060-0035-001.
I've tried to record the sound in the link below. What you'll here firstly is the socket switch being flipped, then the relay kicking in then the warbling sound. I've tried different power cords and also wall outlets, no change.
The sound is audible from about 3m (9ft) from the PSU.
https://youtu.be/lPwTEdxI9mk
Any advice gratefully received.
Jacques
I recently acquired a second hand SGI Octane Cherokee PSU, and while it does power on and 'work' in the workstation, it makes a rather disturbing noise. I wouldn't call it coil whine, it's more like a warbling electrical noise. The noise is from a specific area on the PSU but before I open the PSU and void the sellers warranty, I thought I'd put up a post to see if anybody has come across this before or has any ideas?
I'm quite happy to replace bad caps etc but if it's something that is likely to cost more than say £25 then I might as well return the unit for a refund. My only issue is these are becoming quite rare and hence resellers sell them for £££ hence the desire to troubleshoot and fix. (I also don't like filling rubbish dumps with electrical waste!)
The PSU has an SGI part number of 060-0035-001.
I've tried to record the sound in the link below. What you'll here firstly is the socket switch being flipped, then the relay kicking in then the warbling sound. I've tried different power cords and also wall outlets, no change.
The sound is audible from about 3m (9ft) from the PSU.
https://youtu.be/lPwTEdxI9mk
Any advice gratefully received.
Jacques
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