Getting troubles when trying to upgrade PSU of Optiplex 5060 MT

The blink codes are indicated here and your code indicates a bad PSU or PSU cable connection or a bad motherboard. 

I know what that blink code means. However, I am sure that both of the PSUs and the motherboard work just well. It seems that the new 500W PSU is not compatible with the motherboard of 5060 MT

Standard 24 pin ATX pinout 

24 to 6 pin adapter extracts 2x12 V yellow wires (#10-11) + gray Pwr_ok (#8)

and 2xCOM (black/Gnd) (#13-15) + green Pwr_on (#14) wires.  Adapter also jumps Green (#14) and COM (#16).

https://www.ebay.com/itm/403259541938

The Dell 6 pinout appears to be 

yellow yellow gray

black black green

https://www.amazon.com/COMeap-Power-Adapter-Motherboard-13-3-inch/dp/B08M5BZ6P8

At this point the best guess is Dell had treacherously switched around the 6 pin from 5060 to 5080.  Although both 6 pins use the 2 yellow 1 gray 2 black 1 green wire voltage standard of 24 pin ATX, the layout in the 6 pin is different.  If this is correct, one can technically extract and rearrange 500w psu 6 pin for 5080 in order to make it compatible with 5060.

Re: Chicony 500W PSU, 6pin + 2*4pin + 8+6pin

another user had reported similar issue.  It does seem the Dell 500w psu designed for 5080/7080 is not backward compatible with 5070/5060, i.e., earlier Dell optiplex models of series 5 that uses psu of 6 pin + 1*4 pin.  Not sure where Dell tricked user.  Is it the 6 pin pin out or 2*4 pin vs 1*4 pin?  Dell moderator has not responded with helpful answer to user question on proprietary 6 pin pin out.  What you could experiment is to use a standard generic 24 to 6 pin adapter for Dell and a standard ATX psu with 24 pin + 4 pin.  User reported such adapter is compatible with xps 8940 which shares Dell oem psu with optiplex 7080.

Can OP upload high res pictures of 6 pin connector of 260w psu for 5060 and 500w psu for 5080?  Although Dell oem psu uses nonstandard color code, they still use green gray black color standard in the 6 pins.  The two 12V wires may use yellow, brown, white, or purple depending on psu manufacturer or specific model.

Optiplex 7050

These are the pictures of the 6pin adaptor of 500W PSU.

purple purple grey

black black blue

The 6pin adaptor of the 260W PSU looks the same as yours.

However I found this: https://www.dell.com/community/Optiplex-Desktops/Dell-5050-MT-PSU-upgrade-from-240W-to-500W/td-p/8053795/page/2

Seems that the pin out of the six pin adaptors on those two PSU (260/500) is not just "rearranged" but "different" from each other. If that's true, it will be very difficult to make modifications so that the 500W PSU could work on 5060MT motherboard.

Actually, from my point of view, I do not understand why Dell changed the pin out of those PSUs. It almost looks like they intended to "create" a incompatibility. So sad~

Re:  I do not understand why Dell changed the pin out of those PSUs. It almost looks like they intended to "create" a incompatibility. So sad~

Thank you for the uploaded pictures.
Dell has been doing something like this for a long time. I agree, so mean. They intended to block user from off-label use of psu.

Re: the pin out of the six pin adaptors on those two PSU (260/500) is not just "rearranged" but "different" from each other.

looks like the pinout of gray wire and two black wires are consistent bth 260/500.  It is possible that the blue wire in 500 corresponds to green wire in 260.  The two purple wires are probably both 12V.

The other question is if pinout of 6 pin of 260/500 is actually the same, what prevents 5060 motherboard from POST using the 500w.  Two possibilities: does both 4 pin of 500w need to be plugged in motherboard in order for psu to work?  Does 5060 and 7080 motherboard power on switch have anything to do?

One interesting point is, if pinout of 6 pin of 260/500 were different, more likely 5060 motherboard would not turn on at all using 500w.  That is not the case. Actually board powers on but throws in an amber error.  Another user reports if one reconnects 260w to 5060 motherboard, it would POST again.  So no evidence of frying of motherboard using 500w.  It is something else that stops post. Curiouser n curiouser.  Some day we will get to the bottom of Dell’s treachery.

Hey did anyone find a solution for this?

Thinking about this post. I don't know if I fully understand but it seems like 500 watt does not POST. It is not ROCKET science or coding. It's just WIRES. There are only 3 parties. A dell 6 Pin port, a Chicony 500W PSU ATX, and A 24 Pin to 6 pin adapter. 

Back to the situation, it cant be the DELL 6 pin port. So its one of the two. The Chicony 500w PSU ATX or the 24 Pin to 6 pin adapter.

Here is my thinking. Standard ATX 24 is standard ATX 24 pin.. Either way both deal with wiring. Either way there has to be a SOLUTION because we dealing with wiring. 

The only other out is the 4 CPU connector throwing the AMBER error.

Did you resolve this issue?

If not, can you still return the PSU & GPU?

I've successfully upgraded the PSU on a 5060MT with one that is 500W for the 7060MT. It has the 4 pin + 6 pin white propriety connectors & 6 pin + 8 pin black power connectors for the GPU.

After looking up the specs for the GPU in your OP, I noticed your GPU is for PCIe x16 v4.0. This GPU is not compatible with the stock 5060MT MB. You need a GPU that is for PCIe x16 v3.0 & has its own 6 or 8 pin female power connector. Furthermore your GPU needs to have that 6 or 8 pin black male connector for the GPU.

@Cam-Mitchell​ what was the part number of power supply you used for the upgrade?