Optiplex 9020 Blinking Orange Power Button

read page 47 yet

PSU failure, it states but that means something deeper,  what does it mean

1: PSU bad.

2: PSU is not bad but the one or more rails are overloaded. or any VRM on the MOBO overloaded due to anything at all shorted, even DP and HMDI cables have a power pin, remove those too, if PSU will  not come on line.

remove all out side things first, just use power  cable

then the hard reset, posted,

then open PC and strip it down.

that is how this is done, but read page 47 and amber blinking scheme.... details matter even beeps.

9020 what, MT,DT, SFF , what>?> see post #1 see DELL Chris post answer that first. then we can talk. ok?

that blinking LED is not the end all, it is not Artificial intelligence of any kind, it's just Dumbo , BIOS that.

do not jump the gun, and think every time it does that the Mobo is bad, as that is extreme,.(and costly)

a bad mobo can be 1000 things different failing, see  those millions of transistors there, even a dead USB port.

I have many thoughts, in fact huge.  I do 14 tests to find the cause, not guess, wana test, or gue$$

Your post I assume Pc is out of warranty and the local shop is off hunting, Elk.

first thing to do on any PC made is to do the strip down test, I've posted this 100s times here. now.

but no problem, we can do it 1 more time.  (this cures latchup,ESD and lightening hit lockups)

do the long hard reset yet>? (is coin cell over 2.9vdc?)_

Dead PC , DEAD BIOS, Fans dead,  BIOS F2 key dead,?   ???????? this power failure and cause is many.

you SEE A PC and 1 LED.  the power button right side has 4 LED behind black plastic did those glow? a code it is. and is on your our service manual.

I see a box of modules and complex electronics, inside, and things plugged in outside to....

Does PC work now with no USB devices. attached, (all removed even kbd/.mouse)

same with no GPU card? removed.

then remove all PCI-e cards and Raid cards if there, all out. and all SATA drive cable pairs pulled next...?????

see the strip down tests here.

For now lets assume one of those things inside or outside are shorted, all electronics made can short.

they can also latch up (for self preservation in ESD events) see hard reset above for simple cure.

NO OS told ,why  but is moot now with HDD pulled, and cards.

is this W10? did you make sure you have only dell or Microsoft drivers only?  not from Scaplers or worse.

a PC with bad driver, will keep failing sleep modes. (turn off sleep, first) and fails.

IF drivers fail, the intel south bridge can go NUTS too, causing only windows problems , and nothing else.

it fails again and then only the 5 second power on works or the deeper, long hard reset works.that tells you the drivers are BAD, 

if you took a spare SSD and loaded w10 on it fresh you'd see the PC works perfect day1 , if ethernet connected at install. it would, if not it is hardware is failing ), My test SSD 120GB cost me a whooping 20 bucks.

you can run a top Linux USB boot media stick all day in demo mode, and see sure the PC works great. (near zero cost took, only cost of media)

as you I can see there are lots of things to do and try , and you local shop knows all this stuff.

one more cause, HDD bad, if the PC has HDD, boot  drive, they can in fact fail at  5 years old.

if yes, that makes all of windows corrupt, for a fact. (or sure any uncorrected errors seen inside S.M.A.R..T)

run ePSA tests (F12) and make sure the HDD does not fail, SMART TESTS< or the HDD is useless,

that is it, the tests are all easy, any shop knows these ropes.... ask them?

thanks for the reply.  Before I got the chance to do the strip down tests, I had a RAID problem and had to get that fixed.  It is now up and running properly.  I am running "Windows 10, Version 1803 with 2 Western Digital 1TB drives in a RAID 1 array.  I am using the onboard RAID with Intel RST Version 14.

Once I got the RAID fixed, it got very hard to restart.  I had to hold the power switch and the power supply switch down a bunch of times.  Just pressing the power switch alone got me nothing - no flashing orange or solid white.  I am beginning to think the capacitor on the power switch has gone out.

What do you think of that?  I'd like to at least get back to blinking orange before trying the strip down test.

had the issue in me rig, got that power button on blinking amber even when in Windows.

had mine blinking amber fixed via configuring boot settings to UEFI in BIOS instead of legacy. might wanna try that. 

Strip down worked on first try. Thanks much.

Same issue. System seemed to be working but amber blinking power button. 

Started on strip down and immediately noticed 1 of my memory chips was slightly out of socket and fully snapped in. Reset it in to socket and closed up. 

Perfect working order on reboot. 

Shocking that was the only symptom. 

Easy fix.