Sunday, April 28, 2013

When your computer will not power on correctly

Power issues with your computer will cause strange things to happen,like reboots,or will not come on at all or even usb issues and the inability to install a operating system correctly.

The power supply is easy to remove and replace it usually has just four screws holding in place on a desktop unit they are in back  on most computers,
and on the inside you have a large plug that powers the motherboard its a 20 or 24 pin white or black connector press the tab down on the side to release and pull straight up,
then look for a 4 pin white or black connector with a tab on the side push that one in and pull straight out, also not all computers have this one.

The four pin white or black connectors called molex connectors do not have tabs on the side you just pull them out, they are tight so you may have to wiggle them a bit by holding on the plastic tight and wiggle and pull till they come out,do not pull on the wires itself, they may come loose.

The four pin white molex  or black connectors power the hard drive, cd and dvd drives,if there are any black thinner ones they are sata power connectors for sata drives
the wider ones are ide drives on older computers.

When your computer will not power on correctly
Power supply testing device can be as cheap as $15 at computer supply sites this is very easy to use just plug all the connectors from your power supply into this tester,
then plug the power into the back of the power supply then turn it on, the power should light up all the leads on the device and your fan should be turning the one in back of the unit and the bottom it it has two fans on it, the power that most often
goes out in my experience is the -5 volts.

Tuesday, April 23, 2013

What to check when your laptop monitor won't come on

Sometimes when you turn on a laptop. either the monitor stays black or its white with no picture. the things to check are the video and the screen.you can do this check by hooking up a external monitor.

On the side of your laptop there is a VGA connection that is usually blue with about 15 female connection holes that fit inside a monitors 15 pin VGA male end.

Once your external monitor is connected you start with you laptop off then as soon as its started use the function key on your laptop the one with fn on it then also hold down the key on your laptop that has a square or rectangle on it that means its for switching to a external monitor, when the switching is done your laptop will show
up on the external and if it looks good your problem will be in the display, if you never get a picture then either you did not do the fn monitor switch keys right or the video in your laptop is dead or even the motherboard it also could be
an inverter inside the screen case or the tubes, maybe even the display itself, inverters are very cheap replacement items for laptops and are usually the cause for these problems, so I start off with this.

The bulbs inside laptops can go also they are cheap to replace but are very fragile so it makes replacing these more difficult.

The new replacement screens for laptops can be pricey and then you have the labor charge also unless you do the job yourself.

Tuesday, April 16, 2013

Install Windows and Linux on separate Hard Drives

The easy way to duel boot Windows and Linux is to install them on separate hard drives. In the first step make sure your bios of your motherboard is set to boot from cd first check with the manufacture to see what keyboard key to press to enter the bios or setup, you can also check your monitor at boot up near the bottom for a message like press delete to enter setup or press F10 for setup, then when you are in the bios setup go to boot options then make sure cd is listed first sometimes you move an item up or down by taping your plus or minus key. The first operating system you want to install is Windows because Linux will see this at Install time and create you a duel boot menu usually called a grub menu, this is where you get to pick which operating system you want to boot up to. After Installing Windows for a security measure unplug the power from the hard drive you installed Windows on that way you will not accidentally erase any data on it installing Linux. When Linux is about half way installed, plug your windows power cable back in so it can detect it in the background before it completes installing and add your boot menu. That about as easy as it gets plus your operating Systems will have their own hard drives.