Believe the computer to be dirty inside, and now you also have a bad Power Supply.Let's start simple, and work our way up, Eva.Computer unplugged from power, open the computer case.STOP!First review Anti-Static Procedures.Anti-Static Procedures:Your body carries Static electricity. Static WILL fry out (Short Circuit), the delicate hardware components inside a computer.Relieve your body of Static BEFORE reaching inside your computer.Computer ON a table, computer Unplugged from power, computer case open;TOUCH an unpainted surface, of the metal frame of the open computer case.This action will relieve your body of Static.IF, you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return.I would like you to see if the computer is dirty inside.Also use a flashlight, and looking in the Back of the Power Supply, see if the internal fan is dirty, and the inside of the Power Supply.Dirt, dust, carpet deodorizer, hair, lint,....you name it, 'kills' a Power Supply. Just like it does for the inside of a computer.Also look to see, if there is a wire touching the fan blades, of the Processor fan.
http://www.dell.com/support/Manuals/us/en/19/Product/inspiron-535sClick on the blue -> Service Manual (1501KB)[Ignore if you are aware;This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.After you click on the file name (Service Manual), it may take up to 30 seconds; before the first page comes up.The PDF file will not show until fully downloaded.Clicking on the Zoom In icon ( + ) at the Top, increases the view size.Doing the same for the Zoom Out icon ( - ), decreases the view size]Moving on............In the list on the left side, click on the blue - Computer CoverTurn the feet on the bottom of the computer, to the Outside.This action releases the Side Panel cover.Remove the Side Panel, lay aside.To go back to the main menu, scroll back up to the beginning of Computer Cover; and click on the blue -> Back to Contents Page.As stated, let's start here.The two main causes of desktop computer failure, is the computer is dirty inside; and Power Supply failure. (Is bad)We may have to go further. May have to replace the Thermal Paste, that is used on the Processor.(The processor fan sits on a finned Heatsink. In-between the Heatsink, and top of Processor; is the Thermal Paste.The Top of a Processor, and the bottom of a Heatsink; are not perfectly smooth.A magnified view would detail, 'Ridges, Valleys, and Pitholes'.When the two parts are mated together, air pockets are formed in-between them; due to the aforementioned imperfections.Air in this case is an Insulator. Not a Conductor.Thermal Paste fills these imperfections, and is an Excellent conductor of heat )Please reply in a Comment.Regards,joecoolvette[
http://www.youtube.com/watch?v=0NbBjNiw4tk ]