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Hardware Forum / PC Hardware / General Topics 1 / April 2008No BIOS beeps
Hi, I am trying to setup a former machine but am encountering some boot problems. The machine is a 800 Mhz Pentium 3 with an Asus CUSL2 motherboard and it simply appears to refuse to boot - no POST beeps at all. The board features a power LED which actually lights up upon connecting it to the power supply - so I would assume missing power shouldnt be the case. Upon booting the CPU fan starts to work as well. I already disconnected all devices, removed the memory, switched the video adapter but still do not get a single BIOS beep (neither ok nor error). One thing I noticed, one of the video cards comes with its own fan, which doesnt start to rotate upon booting however (I dont know whether its the card or the board however). Would anyone have an idea what it might be. Thanks very much. > Hi, > [quoted text clipped - 14 lines] > > Would anyone have an idea what it might be. Thanks very much. Are all of the video adapters you've tried AGP? Try an old PCI (or onboard) video adapter if you have one. I had the exact same symptoms from a bad power supply. It apparently could not supply enough juice for the AGP slot. Also, a dead CMOS battery can create a variety of problems. Replace, or just remove to see if that has any effect. >> Hi, >> [quoted text clipped - 22 lines] > Also, a dead CMOS battery can create a variety of problems. Replace, or > just remove to see if that has any effect. You could also try removing the video card, and try running it without video. The board is 815E GMCH, with VGA connector on the back of the motherboard. So it has video built in and doesn't need a video card present. If you remove all RAM, and the processor is working, and the processor is able to run BIOS code, you should get a beep pattern for missing RAM. If it won't beep (and the speaker is known to be good), try reseating the processor in the S370 socket. I'd also check the BIOS chip socket (near PCI slot 5), and see if the BIOS chip is still present. BIOS chips have been known to develop bit errors, over long periods of time. This is sometimes referred to as "bit rot". But it is not going to be easy to fix, unless you have another CUSL2 handy to use for testing of the BIOS chip (swap them). Paul >>> Hi, >>> [quoted text clipped - 42 lines] > > Paul For starters, just try resetting the bios > You could also try removing the video card, and try running it > without video. The board is 815E GMCH, with VGA connector > on the back of the motherboard. So it has video built in and > doesn't need a video card present. Thank you Paul, I didnt even notice this until now :) but unfortunately it didnt make any difference. > If you remove all RAM, and the processor is working, and the > processor is able to run BIOS code, you should get a beep pattern > for missing RAM. If it won't beep (and the speaker is known to be > good), try reseating the processor in the S370 socket. Well, I didnt use the machine for quite a while but IIRC the speaker worked properly the last time. As to the processor, I reseated it twice meanwhile and - although, due to lacking testing, I cant be fully sure - I'd assume it is working (at least I cant notice any obvious damages). > I'd also check the BIOS chip socket (near PCI slot 5), and see > if the BIOS chip is still present. [quoted text clipped - 3 lines] > going to be easy to fix, unless you have another CUSL2 handy to use > for testing of the BIOS chip (swap them). Unfortunately I neither have another CUSL2 nor would I have the experience to solder out the chip. > Paul Thank you very much again Paul. > Are all of the video adapters you've tried AGP? Try an old PCI (or > onboard) video adapter if you have one. I had the exact same symptoms > from a bad power supply. It apparently could not supply enough juice > for the AGP slot. Thanks, I already thought of this possibility but unfortunately I am only having AGP adapters at the moment. > Also, a dead CMOS battery can create a variety of problems. Replace, or > just remove to see if that has any effect. The battery actually is empty, but replacing it with a working one didnt change anything. Thanks again Grinder. > Are all of the video adapters you've tried AGP? Try an old PCI (or > onboard) video adapter if you have one. I had the exact same symptoms > from a bad power supply. It apparently could not supply enough juice > for the AGP slot. I cant say whether it was actually the AGP card (as it didnt work either with the internal one) but it seems the power supply is the actual reason. I just tried another one and the machine could boot - at least up until POST as there is currently no OS installed. Thanks again. >> Are all of the video adapters you've tried AGP? Try an old PCI (or >> onboard) video adapter if you have one. I had the exact same symptoms [quoted text clipped - 7 lines] > > Thanks again. I happy to hear you've found the problem at the expense of only one fistful of hair. > I happy to hear you've found the problem at the expense of only one > fistful of hair. :) Thanks, I hope it will remain a fistful only ;) |
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