I have hp all in one pc model #20 c023w. It starts to the hp logo and flicks off immediately

[mnwildfire]

Turned on pc and it flashed on to hp logo and went out

[Lil_Boy_Blue]

Hi
First:- Turn off the computer, press and hold the PWR button for 4 seconds.

Then - Leave only keyboard and mouse connected, disconnect all externally connected
devices such as Docking Station, USB storage devices, displays, and printers.
Unplug the AC adapter from the computer.

Next - Press and Hold the Power button for 15 seconds to Hard Reset.
Rinse and Repeat

Power on your PC, press Esc (repeatedly), then F2 at the prompt.
Choose System Tests (Fast Test does a 4 minute hardware check).

[iomare]

Hi,

When you say flicks off, do you mean it turns off completely? No fans, nothing?

Are you able to reach the startup menu? Turn off PC by holding the power button. Turn on PC and press ESC continuously until the startup menu appears. Next press F2 to enter diagnostics and perform system test. See if there are any hardware failure codes and let me know.

Regards,

David

[mnwildfire]

It  never really turns on just hp logo clicks in and off. I tried all suggestions, and last held escape key and. Start an very loud beeps almost like a horn came on so I unplugged power supply thanks, all help is appreciated

[mnwildfire]

Did all suggestions and when I hit escape and power button, loud beeps almost like a horn so I unplugged power

[Lil_Boy_Blue]

https://support.hp.com/us-en/document/bph07107

They would probably be the thing to indicate the fault.

You get a LONG (MAJOR) signal category, RED LED &

then a SHORT (MINOR) signal category, WHITE LED.

Major – the category of the error; Minor – specific error in that category

The AUDIBLE repeats 5 times, and the VISUAL until power is removed.

Category	MAJOR MINOR	Issue description	Troubleshooting Steps
BIOS	2.2	The main area (DXE) of BIOS has become corrupted and there is no recovery binary image available. Also happens when updating BIOS.	Typically no steps needed. 1. Allow the system to complete its updates and changes. 2. If updates are stalling, attempt Sure Start Recovery.
BIOS	2.3	The embedded controller policy requires the user to enter a key sequence.	1 Follow any prompts given. 2 If issue persists, attempt Sure Start Recovery.

etc etc.