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"operating system not found"

5:19 am on Jun 4, 2007 (gmt 0)

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I have an HP Pavilion 310n which I purchased brand new in 2002. A while ago, it began to cease normal function. It would boot up all the way until the black screen with the windows logo and the loading meter, and then the computer would suddenly turn off, and then turn back on all by itself and repeat this never ending process. At first, I thought it could be the power control unit because the fan was not functioning normally. It would go slow and sometimes hardly at all. I replaced the pcu and still no luck—same never ending occurrence, so I sent the new pcu back and put the old one in after I cleaned it and the computer from all dust that could potentially inhibit it from normal function. The fan was working better on boot but still the computer would perform the never ending sequence. It was time to upgrade anyway so I bought a new computer and let it collect dust, but now I’ve taken it out again to try to fix. I recently left it with a computer specialist and he told me that it needed and new hard drive because the computer was not recognizing the drive. I didn’t want to pay for him to fix it so I brought it home an ran some tests myself. Upon boot, the computer went to a black screen and read “operating system not found.” I took the hard drive out and set it as a secondary drive in my new computer. I reformatted it successfully and it worked as a storage drive. I then installed windows XP on the drive and that was also successful. I then took the drive and put it back in the old computer and it still would not recognize the drive. I checked the bios and the boot sequence was set to CD-ROM then Hard Drive. I used the windows XP installation disk to run the recovery console. I rewrote the Master Boot Record using the “fixmbr \Device\Harddisk0\Partition1” command which was given from the “map” command. That did not work so I then entered the recovery console again and entered the command “fixboot” to rewrite partition boot record. If someone could help me diagnose this issue, I would greatly appreciate it.
5:42 am on June 4, 2007 (gmt 0)

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If it's an HP machine, do you have the original "recovery" disk? If so, try running that. Just a suggestion.
9:29 am on June 4, 2007 (gmt 0)

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WebmasterWorld Senior Member kaled is a WebmasterWorld Top Contributor of All Time 10+ Year Member

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Sounds like the diagnosis was close but not quite right...

If the hard disk works correctly on another machine, then it is likely to be ok, however, the disk controller on the motherboard may have developed a fault.

You could try...
1) reflashing the bios
2) adding a new disk controller (disabling the one on the motherboard - check this is possible).
3) replacing the motherboard
4) placing the disk in a USB box (if the motherboard can boot from USB).

Of course, I am assuming that the master/slave setting is correct and the power supply is ok.


5:45 pm on June 4, 2007 (gmt 0)

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WebmasterWorld Senior Member jtara is a WebmasterWorld Top Contributor of All Time 10+ Year Member

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I hope the "other computer" was an identical one.

You can't expect to install Windows XP on one machine and run the disk on another machine. Most likely too many driver differences.

In concur with the previous comment - probably a controller problem.

7:25 pm on June 5, 2007 (gmt 0)

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The disk that I used to reformat the hard drive and run the recovery console is a windows XP reinstallation CD from a Dell Inspiron laptop that I purchased a while ago. My other computer that I used to test the hard drive from the HP is a Gateway GT4016. I also have another hard drive that I had previously been using as a storage unit and attempted to reformat that in the HP, but no luck. I would turn the computer on, it would load the XP reinstallation disc, I would then attempt a quick format, the computer would restart as to begin the XP reinstallation, only it wouldntit would read the CD ROM again and load up the XP installation and recovery options. I read up on reflashing the BIOS but am not familiar with the process. I dont want my CPU to turn into a paperweight if that was the wrong move, but then again it already is a paperweight. Im beginning to think it must be something with the motherboard or controller. In that case I guess Ill look into testing those options.