1) Remove the Ram Memory module, or modules. ('Stick')
Clean the gold plated contact pins with a pencil eraser.
Remove ALL power. Remove the AC adapter (Charger), and Battery.
The Ram Memory is accessed from the bottom of the laptop, in the Memory Compartment.
Everywhere on the Ram Memory module EXCEPT the gold plated contact pins at the bottom; is the BODY.
The Body is coated with a see-through protective plastic.
Handle the Ram Memory module by the Body; refrain from touching the gold plated contact pins.
General example of a SO-DIMM ram memory module,http://en.wikipedia.org/wiki/File:1GB_DDR2_SO-DIMM.png
If using an eraser on the end of a pencil, and not a solid eraser, refrain from letting the metal band of the pencil, touch the gold plated contact pins.
Rub up, and down; and back and forth; on ALL contact pins, BOTH sides. Doesn't take much pressure, nor rubbing; to clean.
In fact when you are finished, you may feel as though you have done nothing at all; or very little.
The surface of the contact pins may not be bright, and shiny.
It's OK. I assure you that you have cleaned them. Doesn't take much 'corrosion' on those contact pins, to make a bad contact surface.
Use air to remove the eraser dust, then reinstall ram memory.
You can use a can of compressed air for computers, if available; or air pressure from your mouth may be sufficient.
After installing, and replacing the Memory Compartment Panel, reinstall the Battery, THEN the AC adapter. (Then plug AC adapter into power)
Still no joy?
2) Do you have the Restoration Disk?
Laptop on, place the disk in the optical drive tray, close the tray.
When asked choose Repair. (Non-Destructive Installation)
Don't have it?
Example from USA.
The disk is free. The shipping, and handling is not. $17 for a 5 to 7 day ship; $24 for a 2 to 3 day ship.
Suggest use HP Support Worldwide, and call the HP Support phone number for your country,http://welcome.hp.com/country/w1/en/support.html
After you click on your country name; on the next page click on -
Contact HP > Then -> Call HP > Technical support after you buy.
(Ouch! That hurts my eyes)http://www8.hp.com/au/en/contact-hp/phone-assist.html#section1
Australia / English.
1-300-721-147 (I believe)
[Would appreciate hearing back on the reception you got.
USA reception is great. Australians are cool people, so I'm betting it's the same ]
Have the Serial Number written down, to give to the nice representative.
This is in the white Service Tag on the bottom of the laptop.
S/N = Serial Number.
(ONLY give out the Serial Number to an authorized HP agent)
It may be that the harddrive is going bad. When using the Restoration Disk, there may be a screen that will pop up, and state use CHKDSK. (CHecKDiSK) Plus instruct how to use it.
This will see if you have any bad sectors on your harddrive. If so CHKDSK will move the needed info over to good sectors; OR you will be instructed that you have an irreparable harddrive; Replace.
No problems. Just replace the harddrive, and use the Restoration Disk.
The Restoration Disk has the basic Windows files on it.
You won't have your information that was stored on the old harddrive, though. You will have a fresh new install of Windows, and the computer will be like it was Day 1, from the store.
If you post the HP product number, I can guide you using specific information, and a LOT more guidance. On the bottom of the laptop is the white Service Tag.
P/N = Product Number.
For additional questions, or to have me clarify further about anything I have stated above; please post in a Comment.
The above is reference to the Sectors. Now you know what they are, and where they are.
Platters in a harddrive are a lot like a CD, or DVD disk. They have Sectors and Tracks, too.
Also make sure the harddrive is plugged in tight. Most laptops have a metal Carrier around the harddrive. The harddrive plugs into the laptop. Then there may be just a Harddrive Compartment Panel, that holds both of them in. Harddrive, and Harddrive Carrier.
Harddrive can be bumped loose. Doesn't take much.
However, there are laptops that use screws to mount the Harddrive Carrier, to the body of the laptop. They usually stay put.
Don't give up on me. We are just starting. This is a diagnosis.
(From across the pond, lol!)