Got power but nothing else
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From: Ron on 16 May 2010 18:32 I went away for all of last week and shut down my pc in the usual way and also switched of the power at the mains as well. On my return when I switched it back on, it starts up as soon as I turn the mains on at the wall socket. The power pack starts, the fans on the power pack, cpu and motherboard run, the keyboard and mouse light up, the dvd/cd drives light up but it does nothing else. No beep, no hard drives, no signal to the monitor, no response from the power button. I also cant shut it down at all other than by the mains on off switch. I have removed every lead and plugin component from the motherboard, including the bios battery, and one by one reconnected each trying to power up each time but I just get the same thing. I seem to be getting power to the motherboard Gigabyte GA-81PE1000 with P4 3.0Ghz proccessor as the fans on the board run but I am now out of ideas. 2mb ram Windows XP pro Homebuilt pc in Lian Li tower case 7 years old
From: Pavel A. on 16 May 2010 20:13 There are no miracles. Someone played with your machine while you were away. Take it to a tech. --pa "Ron" <ron6a(a)ntlworld.com> wrote in message news:beb16eab-121a-4201-827a-c54f2c52e739(a)q33g2000vbt.googlegroups.com... > I went away for all of last week and shut down my pc in the usual way > and also switched of the power at the mains as well. On my return > when I switched it back on, it starts up as soon as I turn the mains > on at the wall socket. The power pack starts, the fans on the power > pack, cpu and motherboard run, the keyboard and mouse light up, the > dvd/cd drives light up but it does nothing else. No beep, no hard > drives, no signal to the monitor, no response from the power button. I > also can't shut it down at all other than by the mains on off switch. > I have removed every lead and plugin component from the motherboard, > including the bios battery, and one by one reconnected each trying to > power up each time but I just get the same thing. > > I seem to be getting power to the motherboard Gigabyte GA-81PE1000 > with P4 3.0Ghz proccessor as the fans on the board run but I am now > out of ideas. > 2mb ram > Windows XP pro > Homebuilt pc in Lian Li tower case 7 years old
From: Paul on 16 May 2010 21:03 Ron wrote: > I went away for all of last week and shut down my pc in the usual way > and also switched of the power at the mains as well. On my return > when I switched it back on, it starts up as soon as I turn the mains > on at the wall socket. The power pack starts, the fans on the power > pack, cpu and motherboard run, the keyboard and mouse light up, the > dvd/cd drives light up but it does nothing else. No beep, no hard > drives, no signal to the monitor, no response from the power button. I > also can�t shut it down at all other than by the mains on off switch. > I have removed every lead and plugin component from the motherboard, > including the bios battery, and one by one reconnected each trying to > power up each time but I just get the same thing. > > I seem to be getting power to the motherboard Gigabyte GA-81PE1000 > with P4 3.0Ghz proccessor as the fans on the board run but I am now > out of ideas. > 2mb ram > Windows XP pro > Homebuilt pc in Lian Li tower case 7 years old This is just a hunch... I think your Southbridge is blown. The Intel ICH5/ICH5R has a problem with static electricity. At least, a lot of failures correlate with handling USB devices on the computer front panel USB ports. But there also seem to be a couple failures, where the problem may be related to +5VSB. Intel has never acknowledged the problem, but Gigabyte did. This is Gigabyte's warning. http://tw2005.giga-byte.com/Motherboard/Support/FAQ/FAQ_456.htm This page says you have ICH5. Likely a lot of other members of the same motherboard family, use that chip. The ICH5 usually has no heatsink on it, making visual inspection easy to do. http://www.gigabyte.com.tw/Products/Motherboard/Products_Spec.aspx?ClassValue=Motherboard&ProductID=1647&ProductName=GA-8IPE1000 The ICH5 can fail two ways. It can burn, with a mark in the center. This picture, is one of the first used widely as an example. (This ICH5 won't be booting any more... R.I.P.) http://onfinite.com/libraries/179057/2ea.jpg Or it can fail silently, and all that happens in a "minor" failure, is all the USB ports die, but the board can still be booted. In the minor failure case, you can install a PCI USB2 card and continue on your way. But your symptoms, indicate the ICH5 is currently under stress. The Southbridge has multiple power rails, and at least one of the "wells" is sensitive to abnormal loading on things like IDE cables. Perhaps a USB port failure, would also upset the power control logic, and cause the computer to switch on immediately. The fact it won't boot, is indicative of a major Southbridge failure. If the ICH5 burns, it won't boot any more. The failure type seems similar to "latchup failure". That is where a CMOS totem pole, turns into an SCR (silicon controlled rectifier), and conducts current directly from rail to rail. That causes the chip to get burning hot. If the bond wires burn out first, you have a "minor" failure type, and the USB loses its power source forever. If the bond wires hold on for half a minute, then the rest of the chip fries, and "she's done". http://en.wikipedia.org/wiki/Latchup Anyway, take the side off the computer, get a strong light, and have a look. It should be relatively easy to find the Southbridge. In this example, it has a couple red SATA ports right next to it. You can see there is no burn mark on the ICH5 here :-) http://www.gigabyte.com.tw/FileList/Image/motherboard_productimage_ga-8ipe1000(rev1.x)_big.jpg By the way, I've read about 30 reports of this problem, for more than one brand of motherboard. One guy set a record, by having something like five motherboards fail that way. Back in its day, there was an epidemic of these. One guy, even had a new ICH5 soldered to his motherboard, as it was still covered under warranty. Even if there was a hidden warranty for this, it's probably expired by now. You can always contact Gigabyte and see what they say, if the failure is the burn mark kind. Good luck, Paul
From: Bill R on 17 May 2010 03:29
Not necessarily so. This could be just a variation of the "It worked OK yesterday" scenario when a powerup surge caused component to fail. It's just that (by coincidence) there was a holiday in between. My guess is that the PSU has failed. I've had several that will produce to certain leads but not all. The PSU is the easist to swap out and check. There may, apparently, be power to the Motherboard but you can't be sure that all tyhe connections are receiving power! Bill R "Pavel A." <pavel_a(a)12fastmail34.fm> wrote in message news:OewEVmV9KHA.1892(a)TK2MSFTNGP05.phx.gbl... > There are no miracles. Someone played with your machine > while you were away. Take it to a tech. > > --pa > > "Ron" <ron6a(a)ntlworld.com> wrote in message > news:beb16eab-121a-4201-827a-c54f2c52e739(a)q33g2000vbt.googlegroups.com... >> I went away for all of last week and shut down my pc in the usual way >> and also switched of the power at the mains as well. On my return >> when I switched it back on, it starts up as soon as I turn the mains >> on at the wall socket. The power pack starts, the fans on the power >> pack, cpu and motherboard run, the keyboard and mouse light up, the >> dvd/cd drives light up but it does nothing else. No beep, no hard >> drives, no signal to the monitor, no response from the power button. I >> also can't shut it down at all other than by the mains on off switch. >> I have removed every lead and plugin component from the motherboard, >> including the bios battery, and one by one reconnected each trying to >> power up each time but I just get the same thing. >> >> I seem to be getting power to the motherboard Gigabyte GA-81PE1000 >> with P4 3.0Ghz proccessor as the fans on the board run but I am now >> out of ideas. >> 2mb ram >> Windows XP pro >> Homebuilt pc in Lian Li tower case 7 years old > |