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Re: before boot menu problem
Lets check & see if your hard drive is still bootable before doing anything else. As soon as you turn on the PC start pressing the F8 key every 2 seconds on the keyboard. A Boot menue will come up. Choose your hard drive by moving the up or down arrow keys. than press enter. You should see other bootable devices like, Floppy (if you have one connected), CDROM & Hard drive. Still stuck with the blinking line? Every computer uses a differant F key to enter the Bios. Your's can be F1, F10 or F12. Just like the you did with the F8 key restart & try each untill you enter the Bios. It will help you a bunch if you have your manual that came with the PC. When you get into the Bios it will load at the main menue. You'll know this because you can set your time in this window. You will not be able to use your mouse just your keyboard. At the bottom of the screen is instructions on how to move around in the Bios. In this Main screen your looking for your hard drive. It should be listed somethink like IDE Primary Master and its nameed like "ST3250NV". Thats an exzample name. Your will be differant. Listed under the primary Master will be Primary Slave. Under that will be Secondary Master than Secondary Slave. One of the Secondary devices will list your CDROM. If you do not see anything listed for the Primary Master than your drive is faulty. The link below shows what is inside of your Presario 4090US. http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00009310&lc=en&cc=us&dlc=en&product=92635&lang=en
You will need a new IDE hard drive.
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Wait until the BIOS has finished loading, or has almost finished. (During this time you will probably see a logo of your computer manufacturer.)
Quickly press and hold the Shift key, which will bring up the GNU GRUB menu. (If you see the Ubuntu logo, you've missed the point where you can enter the GRUB menu.)
Select the line which starts with "Advanced options".
Select the line ending with "(recovery mode)", probably the second line, something like: Ubuntu GNU/Linux, with Linux 3.8.0-26-generic (recovery mode)
Press Return and your machine will begin the boot process.
After a few moments, your workstation should display a menu with a number of options. One of the options (you may need to scroll down to the bottom of the list) will be "Drop to root shell prompt". Press Return with this option highlighted.
The root partition is mounted read-only. To mount it read/write, enter the command
mount -o remount,rw /
If you have /home, /boot, /tmp, or any other mount point on a separate partition, you can mount them with the command
(This must be done following step 8 so that /etc/mtab is writable.) Alternatively, you could try selecting "Enable networking" in step 7, though this has been found to cause the system to hang (see https://bugs.launchpad.net/ubuntu/+source/friendly-recovery/+bug/981792).
NOTE 1: If you have Ubuntu Quantal (12.10) or earlier, omit step 4 (the recovery mode menu items are displayed on the top-level menu). NOTE 2: If you reboot, there is no need to hold the Shift key in step 3. The GNU GRUB menu will continue to be displayed automatically on each boot until a normal startup of Ubuntu completes. To configure GRUB so the menu is always displayed, even after a normal startup, see https://help.ubuntu.com/community/Grub2/Setup.
Apparently your Acer cannot find the operating system. As soon as the Acer logo comes up, there should appear in one of the bottom corners "F" & a number should appear. Immediately start pressing that F number (top row of keyboard). This should take you to a boot screen. Scroll down to boot sequence. Hit enter. Make sure boot-up sequence is CD or floppy drive first, second should be HDD, then escape. Restart computer. Should then boot off CD drive. I am assuming you have an operating system (XP, windows, etc.). Let me know if this doesn't work.
Ok, well if your machine shows the manufacturer logo (Compaq) and then goes to the blinking light there is usual and issue with either the hard drive (hardware) or the installed operating system (software).
If the cursor is blinking before the logo this is usually an bad component (most likely ram or motherboard) causing the machine not to turn on correctly.
All of these issues need professional help, if not under warranty I would bring this to my local shop to be looked at.
You can press F10 and you will get the option to take the computer to system console and then follow the steps and if you have the CD with you then follow the steps below
1 Shut down your computer and restart it. Watch for the Compaq logo, then press the "F1" key to enter setup. 2 Press the right arrow within setup to go to the Boot menu. Press the down arrow to access the "Boot Device Priority" option. Change the first boot device to CD-ROM by pressing the down arrow until "CD-ROM" is displayed. 3 Eject the CD tray and place the recovery CD that came with your computer into the tray. If you do not have a recovery CD, you can order one directly from Hewlett Packard. 4 Shut down and restart the computer. The Presario will automatically boot from the CD and begin the recovery process. 5 Select the operating system your computer shipped with. Many Compaq recovery CDs support multiple operating systems, so be sure to choose the operating system your computer shipped with. 6 Insert the operating system CD when prompted. Enter the license key for the operating system when prompted. The license key is typically found on a small tag located on the top or side of the computer.
Your boot menu for Windows is corrupt. Try to boot from the windows installation disc and make sure to key any key when told to boot off the disc. Once the windows files load, you will have a choice of what to do next. If you have XP, choose the repair option and you will be faced with a black DOS screen...after the blinking cursor type
FIXBOOT hit enter Try to boot the computer without the disc in it. If it does not boot, then boot off disc again and this time type:
FIXMBR hit yes and enter
Try once again to boot without the disc.
Also try to boot into safe mode by tapping F8 when you see the Compaq name come up during starting. If you can get to the multiple boot up option screen, scroll to "Safe mode with networking" and choose that. If it boots then you can go to the start button > accessories > system tools > system restore > choose a restore point back a day or two and follow the prompts.
If you have Vista, boot off the disc and choose start up repair. If that doesn't work, boot again and choose restore computer to an earlier time. Again choose a restore point back a few days. Good luck ParrotHead PC Repair
can u try to boot into safe mode f8 if not boot into bios than go to your harddrive area and see if it can find your harddrive and try the default settings and save and reboot also make sure there is no cd rom in the drive and there is no floppy in the drive
get in the bios settings and make sure to have the hard drive in the boot line, try different settings like SATA/IDE compatible mode if the drive is not seen by the motherboard, try different plugs. if the bios settings don't stay , check the position of the clear cmos jumper and change the backup battery of the motherboard. Try to boot from cd. maybe a virus took off the boot flag from the hdd.