All lights flash like crazy on powering up; diagnostic says "turn power off & on"

3UR17AA <<<??? 2 years old?
so the screen is 100% dead, after OSD?
the bios hot key is dead.? forget windows, what about BIOS pages.

this AIO has and option of GPU card, does hit have that?

I guess you mean OSD name for bios?
OSD is only inside monitors.external.
or OSD means the HP splash screen
F2 diagnostics work? and pass per the HP manual?
page 41
removing that coin cell first. was a bad idea, now all bios setting are lost, and now must be replaced, bit by bit.
power on the PC and hammer esc. key
this is the bios hot key, and then see the other keys prompted
F2 is diagnotics

the manual is crazy hard to understand, (even show things that do not exits)

https://support.hp.com/us-en/product/hp-envy-all-in-one-pc-32-a1000i/32482438/model/35865675/manuals

HP offers no service manual here. sad that.
better Esc + F2 diag, in order.

https://support.hp.com/us-en/product/hp-envy-all-in-one-pc-32-a1000i/32482438/model/35865675/document/ish_3974055-5915181-16

this fake desktop AIO, has huge 280 watt power brick pack/.
that must be only used for this PC and not mixed up with others.
and connections checked to it, carefully

but the ESC key i first, if this makes BIOS work then we work from there as did kill all BIOS settings at coin pull.
and the 2 year old coin was good.
good cluck fixing any AIO PC.

this the ESC menu. HP classic.
f2 is first. diag
then if diag passes
next is F10
we then , in the F10 main bios pages do this.
do the bios reset. to factory defaults.
then set time and date
and any instances of PXE to off (disabled)
last the boot order pages, set to windows manager, first this new name means boot drive, (UEFI)
save
exit and cold boot the pc POWER BUTTON HELD FOR 10 Seconds and released.
FIY, the F11 key is the windows 10 reload image, feature. (avoid this on a 2 year old PC, windows is ok but bios settings are lost.

If you didn't accidentally unplug the four pin connector near the CPU, you need to replace the power supply. This is actually a fairly common occurrence with the cheap ATX power supplies being tossed into systems these days.

Hi, when a cell phone battery works fine as you said and the cell phone does not come on, it is usually a fault from the board of the phone which the memory of the cell phone.

When the memory of the phone dies, the phone will not be able to power up by itself..

To restore by the phone to it's normal state,you will need to power up the phone by flashing the phone memory that was died..

Flashing the phone will make the phone power on and work normal again.

You can use the below link to no the process to flash the phone ..


hubpages.com/hub/How-to-Flash-your-cell-phone


and

unlocktotalk.com/UnlockCodeInstructions.htm.

Take care.

I just went through a heap of troubleshooting with power supply issues before swapping psu's and finding this was the solution to my problem. Had a closer look at my psu that was faulty, the green light was flashing on the psu, unplugged all components and thought that I now had a non-flashing green light on my psu, on closer inspection the light was actually flashing very fast so appeared to be an almost solid light...the psu was stuffed so replaced it and no more issues. If your power supply has a green light check to see if it is flashing when plugged into voltage with nothing connected to it. If it is a solid light then it is probably ok.

this is most likely the sustainer board(s) problem. Replacing the sustainer boards should correct this problem for you. you can get the parts at vancebaldwin.com

In addition to providing information about current tasks, the lights on the front panel can also indicate error conditions, as described in the table below:
If the On light, Check Print Cartridge light, Check Paper light, and Start Copy, Black and Start Copy, Color lights are all flashing, do the following:
1 Verify that the front-panel overlay is attached to the HPPSC.
2 Turn your HPPSC off and on by disconnecting the power cord and reconnecting.

Alternatively,

All ights blinking: An error caused the HPPSC to stop functioning.
1 Turn the HPPSC off and then on.
2 Restart your computer.
3 If the problem is not corrected, unplug the HPPSC and plug it in
again.
If the problem persists, contact HP.

Hi

The HP Deskjet 6127 has four buttons and three lights on the front panel

Flashing lights on the printer indicate the status of the printer

When all the lights are flashing, the printer may need to be restarted

try this 1st press the power button to turn off the printer, and then press the power button to it back on very quickly.

2nd press the power button to turn off the printer and hold it down.

Good luck

Hi

If you find the lights flashing, we could try resetting the printer.I have explained the reset procedures below

POWER DRAIN:-Turn off the printer, Unplug the power cable from printer and from the wall outlet.Press and hold ON buton for 30-60 seconds.


PARTIAL RESET:-Unplug the printer power cable while its ON, press and hold # and 3 button and connect the Power cord while holding.Wait untill the ON light flashes, then release the buttons.

----(for below reset cartridges must be removed out)---------

SEMI_FULL RESET:-Remove the ink cartridges, Unplug the printer power cable while its ON, press and hold # and 6 button and connect the Power cord while holding.Wait untill the ON light flashes,or wait for 20 seconds,hen release the button.If the printer goes off dont worry release the button and Push the ON button.


FULL NVM RESET:-Take the Ink Cartridges out, Unplug the printer power cable while its ON, press and hold OK and CANCEL button and connect the Power cord while holding the buttons.keep Holding the buttons until the printer goes off ,release the button and Push the ON button.

Thanks
Riz

Try to unplug the power cable as well as the USB cable of your printer for few minutes. Then plug it back in, check the lights again.

Have you tried removing all cable connections on it and turning printer off and unplugging it from power supply and powercycle?