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Re: has power, but will not post up or go thru boot
Hello my friend,if you sure that is having power and is not motherboard or CPU error then you should try resetting your bios settings or check if the bios battery is dead.You should take it to a repair shop to take a look or tell me if you want to try to change the cmos battery but remember that the warranty will be void and you may harm your computer.
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Click the power button and watch the screen to see which key it says to
press to get into the Bios or System Setup. Change the boot order or
boot sequence. You want to boot from the cd drive 1st and
the hard drive 2nd. This will change it permanently. Then reboot.
might also be an option to change it temporarily when you boot the
system. Just watch the screen and see if it shows you which key to
press to change the boot order or boot sequence. It is only effective
for this one boot.
Pressing f10 during system restart will gain you access to the bios. Using the arrow keys scroll to the boot sequence and hit enter. this should allow you to choose from , and select a primary boot order sequence. Follow the on screen instructions to make the changes. Then hit esc button. be sure to save and exit setup.
You need to go inside BIOS to find out whats the boot sequence. To activate the BIOS Utility, press F2 during POST (when “Press <F2> to enter Setup” message is prompted on the bottom of screen). Press F2 to enter setup. The default parameter of F12 Boot Menu is set to “disabled”. If you want to change boot device without entering BIOS Setup Utility, please set the parameter to “enabled”. Press <F12> during POST to enter multi-boot menu. In this menu, user can change boot device without entering BIOS SETUP Utility. Navigate to BOOT page on top.
it could be any of the two. problem with your power supply section and mainboard. the reason it shut down repeatedly, is the unstable supply of dc voltage on your laptop. try using another charger/adaptor.if the mainboard is the culprit. you have a serious problem. visit your local service center.
Disconnect the hard drive and the floppy drive cable at the mother board. The retry POST and try to clear up any problems in POST. If this works fine then the floppy drive cable is either reversed at the unit or the hard drive is jumpered wrong.
When you hit the power button on your computer a whole lot of stuff
happens. We call this the boot process. In the days when I first
started using computers there was literally a "boot disk", a floppy
(5.25" not a 3.5") disk that told the system where to go and what to do
so that the operating system would start up. Since then the boot
sequence has become somewhat more complicated. So let me take you thru
the steps the computer takes to get started. For my example I'm going
to use a Windows XP system.
First is the POST, this stands for Power On Self Test, for the
computer. This process tests memory as well as a number of other
subsystems. You can usually monitor this as it runs each test. After
that is complete the system will run POST for any device that has a
BIOS (Basic Input-Output System). An AGP has its own BIOS, as do some
network cards and various other devices.
Once the POST is
complete and the BIOS is sure that everything is working properly, the
BIOS will then attempt to read the MBR (Master Boot Record). This is
the first sector of the first hard drive (called the Master or HD0).
When the MBR takes over it means that Windows is now in control.
MBR looks at the BOOT SECTOR (the first sector of the active
partition). That is where NTLDR is located, NTLDR is the BOOT LOADER
for Windows XP. NTLDR will allow memory addressing, initiate the file
system, read the boot.ini and load the boot menu. NTLDR has to be in
the root of the active partition as do NTDETECT.COM, BOOT.INI,
BOOTSECT.DOS (for multi-OS booting) and NTBOOTDD.SYS (if you have SCSI
Once XP is selected from the Boot Menu, NTLDR will
run NTDETECT.COM, BOOT.INI and BOOTSECT.DOS to get the proper OS
selected and loaded. The system starts in 16-bit real mode and then
moves into 32-bit protected mode.
NTLDR will then load
NTOSKRNL.EXE and HAL.DLL. Effectively, these two files are windows XP.
They must be located in %SystemRoot%System32.
NTLDR reads the registry, chooses a hardware profile and authorizes device drivers, in that exact order.
this point NTOSKRNL.EXE takes over. It starts WINLOGON.EXE that in turn
starts LSASS.EXE, this is the program that display the Logon screen so
that you can logon.