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The boot sequence has nothing to do with how this acts.
The boot sequence tells your computer what to boot from.
Here's an example of a boot order list.
1. Hard Drive 2. Optical Drive 3. USB Drive 4. Floppy Drive
If it can't detect an OS on the first one it goes to the next one on the list until it finds something that can boot.
You should try to update your computer, possibly clean it up. It could contain some sort of malware on it.
If it's an option, you should just do a reformat and that should fix all your problems up. If that doesn't fix your issues then you're going to need to get some new hardware aka bring it into a shop or buy a new laptop.
If your laptop appears to boot up and the hard disk LED flashes, then the problem is probably a back light fault. This can be a faulty inverter or a faulty CCFL lamp. Please click on this link and follow my instructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen
Windows won't start up? Well, try this Download Tenorshare Data Recovery from its offical site and install it. Burn it into CD/DVD, or USB flash, put into the computer you need to repair, Bios setting.It can make sure your important data will not lose.Best of luck Related: windows won't start
Boot the computer and watch the screen. It will tell you what key to hit to get into the Bios or System Setup. You have to hit the key when you see the message or it won't work and you will have to restart.
It also shows you which key to hit to change the Boot Sequence or Boot Order. But you have to hit the key when the message appears on the screen or it won't work and you'll have to reboot. This is a temporary 1 time change for the current boot cycle. When you change it in the Bios or System Setup it's a permanent change.
Do you hear the fans running? Do you hear the hard drive spinning? Did anything ever appear on the monitor?
Remove the Power Cord, Open the Case and remove one of thememory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x onit with an ink pen. If it fails to boot then move the chip to the nextmemory slot and try rebooting. If it fails take the chip out and set itaside, then put the other chip in and try booting it in both slots. If itboots, just to verify that the chip set aside is bad, mark an x on it and putit into the open memory chip slot and try booting.
The long buzzing sound indicate the nature of the problem. Depending on the manufacture of your bios will determine the problem. With only one long beep you may have memory problem. The computer cannot initiate the boot sequence. Did you add any devices to the computer prior to your problem. if you did undo what you did. Make sure the computer is on, if nothing happens ( no lights, no sound, no fans etc.) the computer has a power failure. Make sure you listen to the beep if it is a numerous beep sequence note it down and check the web for computer beep during boot up.
When you press the power button do you hear the fan running, hear the disk drive running, see any lights, do you hear the cd drive click once and see the light come on briefly on the cd drive door? If you see all the aforementioned then it is surely trying to boot. Computers don't boot mainly because of the following problems. 1) Bad Power Cord or Power Supply. 2) Electro Static Buildup. 3) Bad Motherboard 4) Bad boot or system files. Remove the Power Cord and the battery if it's a laptop. Press and Hold the Power Button for 30 Seconds. Then replace only the Power Cord and try hitting the Power Button. If it boots you had an Electro Static Buildup. If you have boot or system files that are missing or corrupt normally the system will be telling you that on an error message that appears on the screen. Does your system show you anything on the screen when you press the Power Button? If not you have a Power Supply or Motherboard issue.
You need to know if your motherboard can do this option. Enter setup otion generaly when you turn your computer on press the DEL key and you are in the BIOS SETUP configuration. Go to the BOOT SEQUENCE and if it is possible choose USB option.Place this option on the first place with the UP or DOWN keys. For exemple fist boot drive : USB second boot drive HDD ,... You must format your USB device as SYSTEM ! and have the system installed on it. You can find on the Web a light version of WINDOWS XP called LIGHT to put it on your USB device I think it is an USB flash drive, Is it? If it is an external HDD you can install the entire system of Windows and boot by it bur select the right boot sequence in the BIOS setup.