Laptop or Desktop computer ?
When is the screen turning blue at start up or during normal running time ?
I will have to be very broad with a solution going on what information being provided.
BSOD Bluescreen of death can be caused by a number of things If the PSU power supply units fan is not working the PSU is faulty http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm
WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules
Only work inside the computer case when the power has been switched off and disconnected. Never open the power source. Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards A bad or faulty motherboard data lead or its connection if its a flat 40 pin ide it will be the first to fail
make sure all leads have a dust free secure connections
A bad driver loose or faulty lead or not having enough ram or the RAM modules might be dirty. Might be getting hot Check you CPU make sure its securely seated and has thermal grease http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-February-2012/1490
Remove the memory modules from their slots. Take the opportunity to clean the slots on the motherboards and the memory module connectors.
Use compressed air to blow dust away and clean contacts with a soft cloth. Do not use a metallic vacuum cleaner if it touches any component it may create a short and cause damage to the motherboard or other components. Then reseat the modules. You should hear an audible click when they are in place. Do not use too much force to reseat the memory module in to the slot this can cause damage to the module, slot or motherboard. You might not have enough RAM random access memory not having enough will cause your computer to run over its maximum limits and can cause the blue screen of death and hang and cause memory dumps
If you're not sure if a module is right for your system, use the Crucial Memory Advisor tool for a list of guaranteed compatible modules.
first you will need to select the manufacturer from a drop down list then select your product line from a drop down list then select the model then click find it will take you directly to compatible ram also you will have an option to scan your system you should always ask the seller if they guarantee the compatability of the ram before making any purchase
if you dont want to install more ram uninstall some unnecessary programs
make sure your ram modules have a dust free secure seating and the CPU central processing unit has thermal paste When Computer Capacitors Are Bad
b> Capacitors look like small metallic canisters and they are found in many different computer components including computer monitors, computer motherboards, video cards, power supplies and a variety of other consumer products. A bad capacitor can cause a variety of computer problems, but if you can identify the faulty capacitor you may be able to replace it and save your computer. Capacitor
Capacitors, sometimes also called condensers, are used to store energy in an electric field. In the context of computing, capacitors are used to block the direct current being circulated around the motherboard. A typical capacitor should last up to 15 years, but some computer manufacturers use substandard capacitors resulting in shorter lifetimes. Computer Problems
b> When a capacitor has gone bad on a computer you may experience a large range of problems. The computer may have trouble booting up, or it may shut down without notice after running for only a short period of time. The most common problems associated with faulty capacitors are that they cause unexpected computer crashes and general reliability issues ranging from read/write issues to distorted screen images. b> Identifying a Bad Capacitor
b> To identify a bad capacitor you will need to open your computer case and locate the capacitors on your motherboard. A bad capacitor may exhibit swelling at the top or the base of the capacitor or it may sit at an awkward angle with the motherboard, so compare the various capacitors in your computer in terms of and placement. Additionally, a bad capacitor may have a funny smell or it may have a brownish residue leaking from the top or the base. b> Prevention
b> Manufacturers claim that capacitors may go bad because a computer is not receiving enough power from a power supply, because of an overclocked processor or because a computer is operating in an environment with too much heat or humidity. However, some capacitors prematurely fail due to faulty work on the part of the manufacturer. If you have a bad capacitor be sure to do research as to the lifespan of other products made by your manufacturer. Identifying bad capacitors http://www.youtube.com/watch?v=ngA4k32jLGc
Capacitor replacement http://www.youtube.com/watch?v=s0Pn2tEjY04
How to check a capacitor http://www.youtube.com/watch?v=U4tnHA0phcc
Replacing a leaking capacitor http://www.youtube.com/watch?v=s0Pn2tEjY04
If eventually you can get a screen Click start control panel administration tools computer management device manager scroll through all of your devices if you see a yellow question or exclamation mark ? ! or a red X you will need to update the drivers for this device right click select update driver/reinstall driver. If you computer came with a motherboard disk the drivers could be on it or you might have to download one. or it might be a virus right click in bottom toolbar select task manager applications to see what is running and processes to see what is ticking over. http://windows.microsoft.com/en-US/windows/products/security-essentials/product-information
malware protection http://100-downloads.com/download.php?p=615
windows xp microsoft security essentials http://100-downloads.com/download.php?p=614
windows 7 microsoft security essentials Click start control panel administration tools computer management device manager scroll to sound video and game controllers you might see a yellow question / exclamation? ! mark or a red X Right click to reinstall drivers If your computer came with a motherboard disk the drivers could be on it or you might download slimdrivers. Rather doing a driver hunt http://download.cnet.com/slimdrivers-free/3000-18513_4-75279940.html
Windows XP/Vista/7/8 Note: it will find all of your outdated drivers This is a free driver solutions which will automatically search for and find the correct driver You will have to update every driver individually once you update you might be asked whether you want to restart or make a system restore point. Click no to both of these then continue updating each driver free then restart once all of the drivers have been updated. It might take some time being free also http://download.cnet.com/2000-20_4.html
Just type in what you want or need be specific you might have to try a few times to get it right. Tick in either the all software or the windows software box. IE: Motherboard name sound drivers