hi my pc has no display

[RgbMoreFps]

hi i have Hp prodesk 40 g2 yesterday this still work when i want to power on this pc no display and loud  i already using eraser to clean ram and it dont work i have alot data on that pc pls help me

[BeemerBiker]

Do the keyboard LEDs light up briefly then powered on?

Does the keyboard CAPS lock turn the LED on and off?  If so, it is possible the system is working but the monitor is bad.  That can be tested using a TV set or another monitor.

Did anything unusual happen since the day before?  like power outage, windows update or add hardware?

From what you described doing it appears the system is not working.  A good technician can tell if power supply or motherboard.

If you send it in for repair be sure to specify the disk not be erased.  Alternately remove disk drive.  You can discuss the problem with the data and see that the repair center suggests.

1) Click on this link -
https://support.hp.com/us-en/contact-hp
2) Select your product type below.
3) Enter the serial of your device.
4) Select the country from the drop-down.
5) Select the chat or get phone number options based on your preferences.
6) Fill the web form and proceed further.
To obtain parts use this list:
https://parts.hp.com/hppartsIGSO/Part_Resellers.aspx?from=ERP&cc=GB〈=EN&geo_code=EMEA

It is possible the repair might be more than the cost of a used motherboard so you need to find out if the problem is the motherboard or power suopply

[RgbMoreFps]

1. No the key caps not showing any light and  i already test it with TV and its still not working   and im adding vgen 10600 2gb and hyperx 4gb and some times is turn off randomly

[BeemerBiker]

Memory requirements are DDR3-12800 

If one of the sticks has that value, put it in slot DIMM-0

See if it boots with just one stick.

[RgbMoreFps]

still not display im i think the psu is bad when i remove the ram its not beeping oh i forget i have cooler master lite 500 80 plus white

[RgbMoreFps]

it still not work

[BeemerBiker]

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@RgbMoreFps wrote:

still not display im i think the psu is bad when i remove the ram its not beeping oh i forget i have cooler master lite 500 80 plus white

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you are correct if you remove the memory the motherboard should still beep although my HP pro 3400 does not have a speaker.  Of course the CPU has to be working because it's making the beep

[BeemerBiker]

Forgot to ask if you tried holding down the power on button for 30 seconds.

[RgbMoreFps]

there is build in speaker in my pc

[RgbMoreFps]

still not working