What typically causes reluctant booting, please? Dodgy sector of HDD where the boot files reside?
Could be. Though have you checked BIOS settings, is the h/d the default boot drive, could BIOS be looking for the floppy / optical drives first? Have you done a BIOS flash?
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Well booting your pc is in two parts. The hardware boot (BIOS(s)) and the software. They need to be in that order.
IS your BIOS booting, ie do you see the BIOS screen, if not press the appropriate button to display your bios.
F8, F1, Alt F1 are favourites.
When you look at your bios is should say if its found the drives ( the bios rescans for drives every boot)
If its not found the drives, then no boot. Finding no drives is due to platter not starting to spin (can you hear the drives spin up) or the drive electronics/cable. Drives suffer from whats call "stiction" The surface of the platter has a thin film of lubricant or teflon like stuff. Sometimes this gets warm and acts like glue. The head lands on its parking zone when turned off, sticks to the platter, and the platter wont spin up.
If the bios has found the drives, and there is not boot you have a MBR problem, tho usually the bios posts a message saying "NO OS OR BOOT DISK FOUND"
So its bios, drive or OS bootstrap., MY bet is the drive.
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TourVanMan TM < Ex RF >
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If you've recently added any IDE devices there may be a conflict between masters and slaves which could cause this.
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Thanks for the help, guys.
No IDE devices have been added.
The problem has been present from day one (ok, day two, to be exact) of this two month old PC, but whereas it used to happen very rarely, now it happens on half the boot attempts.
During the non-boot scenario, as well as the fans running flat out the screen stays resolutely black.
That is black as in no signal black, not black as in generated black.
I know there is no signal because the monitor power light flashes until, eventually, after several cycles, boot starts.
When boot starts it does so normally and always fully succeeds with (in sequence)
1) A scrolling memory count check (correct 2GB found)
2) A (correct) systems check including which bays have drives and which are empty, and if they have drives, what they are
3) A "keyboard present" check
4) Start XP
Boot detection drive sequence is (correctly) M (primary DVD), N (secondary DVD), C (primary HDD)
Like TVM I too worry that I have a duff drive.
Perhaps time to talk to MESH (again!)
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I should also add, during operations 1-3 the normal keystroke options to interrupt boot are displayed at the foot of the screen, but I have never used them.
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Not sure if this will help, but I had almost exactly the same problem you describe immediately after i fitted an AGP slot graphics card (nvidia). computer behaved exactly as you describe, If you have an Agp card, try removing it, and see if it will boot with on-board graphics, if it will you may have a compatability prob with graphics card.
HTH,
billy
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Thanks for the thought, billy, but initially I used the PC with on board graphics only and the problem was present even then.
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Disconnect/remove whatever you can (drives, network card, USB devices etc etc) and reboot a few times to see if it ever blanks. If not, reconnect things one by one, testing along the way, to see if there is a culprit. If it does it without anything connected then it's a motherboard/BIOS problem (or conceivably power supply) - possibly reflashing the BIOS (if poss) could help. In fact it'd be worth checking the board manufacturers page to see if there is a later BIOS anyway.
I have a similar problem when I have one of my USB devices connected at boot time.
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It sounds like the problem is way before any hard drive detection takes place. The monitor should still run with no HDDs, FDDs or other drives connected.
Assuming you can open the case without voiding the warrenty i would check the RAM and motherboards main power plugs are fitted securely.
It could also be an intermittent fault with the power supply.
>>Perhaps time to talk to MESH (again!)
Might be the best bet, but assume from this you've been unsucessful with them?
Probably a little extreme but you could try unplugging everything, USB ports, keyboards etc, and all the disk drives. Leaving just the RAM, graphics card and monitor and see if it will attempt to start reliably. Obviously it won't get very far though.
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Thanks, guys; will try the "unplugging" technique tonight.
>>Perhaps time to talk to MESH (again!)Might be the best bet, but assume from this you've been unsucessful with them?
No, quite the opposite actually; they really have been very good, it's just that I have had rather more cause for use of their services than I would have hoped for a well built PC using high quality components. The major beefs so far have been four of six USB sockets operating as v1.1 (after much work from us both, successfully solved by MESH advice as documented in another CRC thread in the Backroom), backup CDs not supplied in the box, tv tuner not supplied in the box despite being ordered, and ongoing tv tuner woes (random "tv tuner not found", random losing of all channels when it is found, and random failing to find any channels on scan. Browsing the web I am far from alone, and these three random faults are common; it seems Windows MCE and tv tuners in general are the most flakily designed combination of devices that could possibly exist. Shockingly so, actually; far from consumer friendly and still firmly in geek land)
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Has the problem worsened since your USB registry tweak?
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Has the problem worsened since your USB registry tweak?
It has steadily got worse since new, with no sudden jump after the USB drivers registry tweak. I did however try setting the registry back to how it was; it made no difference (though the four back panel USB ports of course went back to 1.1 so I have since re-made the tweak and got 2.0 back)
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Sine has already provided the answer.
Your failure to boot is way before disk drives come into factor. I would have said, motherboard/powersupply/video card. However the problem happening with the on board video chip as well indictes its not the video (which has its own BIOS)
Your problem is power supply or motherboard. Make sure you have nothing external plugged in via USB. YOu can then isolate either motherboard or power supply by checking to see if the CPU fan is turning when the boot fails. If it is, the Motherbaord has +5volts and the power supply is probably working ok
Either way this is a return to Mesh Jobbie. Its very undesirable behaviour and its faulty and will get worse. motherboard or power supply or both changed please.
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TourVanMan TM < Ex RF >
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Your problem is power supply or motherboard.
Just completed the "unplug everything" idea.
The wires from the PSU were a massive bunch tightly bundled up with cable ties and with some of the free ends consequently under great tension where they connected with whatever circuit board applied. The power feed to the motherboard was the worse affected, falling free with the slightest movement of the massed bundle. Hopefully this was my culprit.
Having noted where each connector went (some are not unique of course, such as for the two HDDs) I carefully cut the cable ties, unbundled the spaghetti, remade as tidy runs, and strain relieved where possible with a small amount of slack.
Since completion I have done ten trial boots without problem.
Fingers very firmly crossed (or thumbs held, as my Scandinavian colleagues say)
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I missed the important bit: "Thank you! "
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