Hi, I have upgraded my HP Pavilion DV1000 RAM to 2G PC2700 DDR 333MHz, but after turning on it just makes 4 short beeps and screen is not turned on, please help me fix this error.

SOURCE: UPGRADATION OF RAM

Hi

Visit this site >HERE< you use an online scanner to detect the memory in your computer and the motherboard installed. When the scan has completed, it will tell you the best upgrades that suit your particular system. You may be asked to download a small driver. This is a very safe and respected site which should tell you all you need to know
:-)

SOURCE: hp pavilion dv2000 no lcd dispaly

Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information
This issue can be caused by any of the below situations.

1. New hardware conflicting with old hardware.
2. Bad or failing hardware device.
3. Connections not connected or connected properly.
4. Recent electrical storm that caused a surge that damaged computer.
5. Other hardware issue.

SOURCE: blank screen long beep 2 short beeps at startup.

The 1 long 2 short beep code means a problem in the video circuitry and the laptop can't initialize the display. This is usually caused by failure of the integrated video chipset. Unfortunately, on a laptop you can't just open the case and install a new video card like you can on a desktop. You need to replace the mainboard. Replacements are available online. Here is one source found by a Google search. (I'm just using this as an example. I haven't dealt with this site.)

The 4 beep code means no memory detected when the computer started up. No surprise there since you had taken it out.

SOURCE: one long beep and 2 short beeps

Depending upon your BIOS manufacturer, generally this POST error code means either a video card problem or a motherboard problem. If the RAM is OK then you have a motherboard problem, and this may not be cost effective to fix. Consider putting your money towards a new laptop, remove the hard disk and put it into an external USB adapter case and use it as an USB hard drive for backup etc.

SOURCE: HP Pavilion dv1000: hard-drive wont load OS

The arm that controls the head has malfunctioned. Your hard drive is probably toast. The more you run it though the more chance you have of not being able to recover the data on it. I have a Tip and Trick for trying to recover some of the data. You can read it here.
Please share it with your friends.
http://www.fixya.com/support/r3584465-bad_hard_drives_and_data_recovery

Testimonial: "useful tip"