Screen won't come on but I can hear fan running and lights come on keyboard. What is wrong with my hp G62-229WM?

use the softare diagnostic coming with the computer or get support via ONLINE chat.
However you must restart the computer HOLD the keys CTRL+f2 or f11 or f12 depend of your model, and go to restore to the factory defaulty.
God bless you

So there is not so much as a BIOS message on screen? Any beeps?
If there is no life at all, you have a CPU/motherboard failure. This may be direct or indirect (e.g. no power to MoBo). Check your connections.
Otherwise, your boot device may not be operating. This is usually a dead or disconnected HDD. Check that it is plugged in. Does it get warm? Can you feel any vibrations from it? It should spin even if your cpu is dead but MoBo is alive.

the fan in your computer is constantly running to cool down the cpu and it is normal for it to increase it's speed, your fan should run quietly even it increases the rpm. But if you hear a loud noise in the fan, i think there's something wrong with it. I suggest for you to check the fan if it's coming in contact with anything. If the fan is visible while your laptop is operating, you can observe it to know what is really happening. I don't know what type of fan hp uses on their laptops, maybe something is loose already on the fan so better check it or bring it to a service center.

Please Go To Programs And Go To Acciors And Go To Assbilty And Click The On Screen Key Board.

Make sure the VGA cable is properly inserted to your pc and monitor

it restarts on booting screen or else at start up screen itself?

Can you hear any fan or drive sounds? If you don't hear anything at all when you try to turn the laptop on, no little LED's light up, the problem almost certainly isn't related to the hard drive. So if you don't have a live screen, start with the LCD troubleshooting flowchart, and if you don't have any activity at all, start with the power troubleshooting flowchart. Even if the hard drive has failed at the electro/mechanical level and won't spin up, this wont prevent the LED's on the laptop from lighting up, or the LCD from displaying the BIOS information and complaining about the lack of a boot device.


Ford F150 Body Kits

If your laptop appears to boot up and the hard disk LEDflashes, then the problem is probably a back light fault. This can be a faultyinverter or a faulty CCFL lamp. Please click on this link and follow myinstructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

When you press the power button do you hear the fan running, hear the disk drive running, see any lights, do you hear the cd drive click once and see the light come on briefly on the cd drive door? If you see all the aforementioned then it is surely trying to boot. Computers don't boot mainly because of the following problems. 1) Bad Power Cord or Power Supply. 2) Electro Static Buildup. 3) Bad Motherboard 4) Bad boot or system files.
Remove the Power Cord and the battery if it's a laptop. Press and Hold the Power Button for 30 Seconds. Then replace only the Power Cord and try hitting the Power Button. If it boots you had an Electro Static Buildup. If you have boot or system files that are missing or corrupt normally the system will be telling you that on an error message that appears on the screen. Does your system show you anything on the screen when you press the Power Button? If not you have a Power Supply or Motherboard issue.

check your hardwares.either memory has mulfunctioned