Installation Problem or Boot Loader

I installed KDE 4.1 and after the the installation everything works fine. So i thought that i should restart the laptop and after i restart nothing appear. I thought that it might be the problem of Boot Loader so i repair it and install a new boot loader. But nothing happen. What will be the problem? Any idea…

My Laptop is Hp Pavilion ze4600 AMD Athlon

Probably grub
HowTo Boot into openSUSE when it won’t Boot from the Grub Code on the Hard Drive

I would do this:

If you have a Linux Live CD, boot from it and log in. Then open a console window and enter su and you will be at the command prompt with root powers and ready to proceed. If on the other hand you have the openSUSE install DVD, boot from it and on the first menu of options select the Rescue System option. That will start an elementary Linux Live operating system and bring you to the login prompt. Enter the username root and you will be at the command prompt with root powers and ready to proceed. Whichever way you started (the openSUSE install DVD or a Linux Live CD) when you are at the root command prompt, first you find the partition containing openSUSE’s bootloader. Then you reinstall Grub with a pointer to that partition. First find the openSUSE installation:
You enter this ---------------- grub
Computer returns like this ---- grub>
You enter this ---------------- find /boot/grub/menu.lst
Computer returns like this ---- (hd0,5)
Here, (hd0,5) is Grub’s pointer to my openSUSE installation. Your pointer will be different from my example (hd0,5). Substitute your values for my example (hd0,5). Now that you have the pointer, proceed like this:
You enter this ---------------- root (hd0,5)
Computer returns like this ---- Filesystem type is ext2fs, partition type 0x83
You enter this ---------------- setup (hd0)
You see several lines like this — Checking if /boot/grub/stage1 exists … yes Computer finally returns this-- Succeeded…Done
You enter this ---------------- quit
You enter this ---------------- reboot

Thanks man! it works.

Good news. Thanks for letting us know;)