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Inspiron 620, no replacement PSU will turn it on

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November 5, 2013 3:21:40 PM

I have a Dell Inspiron 620 desktop that's got me flummoxed. First, it was not powering on. After testing a few things I got a non-standard reading from a PSU tester (slow on the PG reading) and decided to try changing that.

I put in a 400 W Diablotek PSU that tested fine and works fine in other computers, but the Dell wouldn't start. I subsequently tried several other PSUs, all of which test fine, all of which power their machines fine, all at or above the 300 W rating of the original Dell adapter. None of them work.

Meanwhile, I cleaned out the one that I thought had failed (it had a lot of dust) and reconnected it (24-pin MOBO, 4-pin MOBO, sata DVD and sata HD) and lo and behold it starts. But when I try any of the other PSUs, they still do not start (no partial start, no fan, nothing).

The original PSU looks standard to my eye, the only difference I see is that the 4-pin power connector is 2 brown and 2 black instead of most of the others which are 2 yellow and 2 black. Is that a meaningful distinction that's preventing any replacement PSU from starting the machine? Any insights would be greatly appreciated. Thanks!
a c 2290 ) Power supply
November 5, 2013 3:25:31 PM

Tier 5 - Other than the units listed above for any of these brands, NOT RECOMMENDED. Replace ASAP if you have one.

A-TOP Technology
Apevia
APEX (SUPERCASE/ALLIED)
Aspire(Turbo Case)
ATADC
Athena Power
ATRIX
Broadway Com Corp
Coolmax
Deer
Diablotek<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Dynapower USA
Dynex
EagleTech
FOXCONN
FSP Everest
HEC Orion
Hiper Type-R
Huntkey
I-Star Computer Co. Ltd
In Win
JPAC COMPUTER
Just PC
Kingwin Inc.
Linkworld Electronics
Logisys Computer
MGE
MSI
NMEDIAPC
Norwood Micro/ CompUSA
NorthQ
NZXT
Okia
Powmax
Q-Tec
Raidmax
Rocketfish
Rosewill
SFC
Shuttle
Skyhawk
Spire Coolers
Star Micro
STARTECH
Thermaltake Purepower NP
Thermaltake Purepower RU
Thermaltake TR2 (and TR2-RX)
TOPOWER TOP
Ultra X-Connect
Ultra X2 >greater than 700 watt
Ultra LSP
Wintech
XION
YoungYear
Zebronics
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