Dell d531 diagnostics run at every reboot

Hello

First find an external monitor to test if its the screen on your laptop or the graphics chip in your laptop. If you have an external monitor then hook it up to your laptop and toggle the video over to see if you still see the spot.If it only shows on the laptop screen the Replace the screen.
Another thing you can do is run the built in Diagnostics
Diagnostics before windows using the F12 Diagnostics
* Reboot and press F12 to enter the Boot Menu
* When the boot device list appears, highlight Diagnostics and press Enter
* The computer begins to run the Pre-boot System Assessment, a series of embedded diagnostics that perform initial testing on your system board, keyboard, hard drive, and display
* If the Pre-boot System Assessment completes successfully, you receive the message Booting Dell Diagnostic Utility Partition
* Press any key to continue
* Press any key to start the Dell Diagnostics from the Diagnostics utility partition on your hard drive
* After the Dell Diagnostics loads and the Main Menu screen appears, click the button for the option you want to run -
Express Test = Performs a quick test of devices. The test typically takes 10 to 20 minutes and requires no interaction on your part
Extended Test = Performs a thorough check of devices. The test typically takes 1 hour or more and requires you to answer questions periodically
Custom Test = Tests a specific device. You can customize the tests to be run
Symptom Tree = Allows you to select tests based on a symptom of the problem you are experiencing
* When you have finished running a test, close the screen to return to the Main Menu screen. To exit the Dell Diagnostics and reboot the computer, close the Main Menu screen.

Try going into safe mode. Press F8 when you start the computer and then select "Safe Mode with networking" you should then be able to run a couple of diagnostic programs or a virus checker. You can even do a system restore from there.

AS YOU ON THE SYSTEM AND EVEN BEFORE WINDOWS STARTS KEEP PRESSING THE F8 KEY CONTINUEOUSLY. A MENU WILL APPEAR. SELECT SAFE MODE AND ENTER. WINDOWS WILL LOAD IN SAFE MODE. THIS WILL SOLVE SOME OF YOUR PROBLEMS. NOW RESTART THE SYSTEM IN NORMAL MODE.

IF THIS DOES NOT WORK SELECT "LOAD WINDOWS WITH LAST KNOWN GOOD CONFIGURATION " AND THEN RESTART. THIS WILL SURELY SORT OUT YOUR PROBLEM.

PLS REPLY OR COMMENT. THANKS

Wath os you uses? In windows you can set this parameters!

Download it from here Dell Latitude D531 Driver Page
Best of LUck

Here you go

http://www.fixya.com/support/r3656360-dell_portable_computer_bios_hard_drive

This could be a software problem, or hardware. You need to determine which. I usually suggest troubleshooting memory first, but the D531 has memory under the keyboard, so in this case try booting from any bootable disk and see if the PC stays up. I like to use Ubuntu Live for my tests. You can get it here:
https://help.ubuntu.com/community/LiveCD
If that is stable, then your problem is probably in Windows and you will need to reload from disk. Make sure you backup any files first.
If your PC crashes off of the LiveCD, pull out half of your memory and try again. Next, try the other memory. The second stick of memory is under the keyboard. This assumes you have two sticks. Directions for removing memory can be found here.

A good cleaning of the inside will mostly help a great deal. Take the keyboard off and blow it out with canned air (available at tech. stores and large department stores.. Target/Walmart) On the bottom take off all the covers and use the air there also. As a last effort blow into all ports and any other openning, After you have done this replace all covers and keyboard. It should help a great deal...if not your efforts are not wasted. If it does not help you better put it in the hands of a tech. Good luck

Hello,

The easiest way to reset your Dell is to use the system restore function:

Start>Programs>Accesories>System Tool> System Restore.

You can chose to restore to an eailer setting or create a new one. If you want to completly restore the system, use the operating system disk that came with your notebook to restore your os without deleting all your data.

Good Luck
C2Solutions

try changing the power management setting to Always ON, then reboot