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| Thread ID: 29225 | 2003-01-13 23:42:00 | PC won't post | antmannz (28) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 113584 | 2003-01-14 05:17:00 | > I'm officially declaring the mobo dead - have removed > everything including the cpu and it still won't post. Fair go, how could you expect it to POST (Power On Self Test) without a CPU. ;) The CPU is needed for any mobo post, as there is no intelligence on the motherboard to execute the code contained in the bios code. A bios chip failure could also cause this. Another posting some months ago had this effect, needing to warm the bios chip with a hairdryer first. Usually terminal though, as many bios chips are soldered into the mobo. |
godfather (25) | ||
| 113585 | 2003-01-14 05:25:00 | >The CPU is needed for any mobo post, as there is no intelligence on the > motherboard to execute the code contained in the bios code. Really?? I didn't know that.... so it could still be that I've fried the cpu? I did notice that the heat paste had kind of melted and run so that there was none directly on the chip but some around it ... if you get my drift. |
antmannz (28) | ||
| 113586 | 2003-01-14 05:38:00 | Oh dear... Perhaps you should see if you can borrow a CPU to test with before you dosh out for a mobo? Or junk the lot, as you may have 2 discrete problems? Remember dont even think of firing one up without full heatsinking on, as it will die real quick. Its not possible to run any code, even that required to do a POST, unless there is something to understand the cose, and execute it. On power-up, the CPU gets a Power_Good signal from the Power Supply, then does a reset and loads code at the default address, which is the BIOS initialisation code. No CPU, no nothing. I am unsure about the Graphics card, as they do contain a "GPU", but doubt they have the intelligence to run a POST by themselves, I think it would be under the command of the CPU |
godfather (25) | ||
| 113587 | 2003-01-14 05:52:00 | Bugger ..... would someone with a gf3 like to completely dismantle their pc and see if it will post only with the vid card in ?? :) :) :) | antmannz (28) | ||
| 113588 | 2003-01-14 06:07:00 | > On a normal boot the geforce will > post first, then the pc Also I *think* you are mistaking the difference between POST and BOOT. You will be unlikely to see the results of a POST on the screen, as it is before it even knows it has one in most cases. Thats why motherboards are fitted with diagnostic LEDs, or beep codes from the on-board speaker. You see the results of a BOOT operation, which is what it does after a successful POST. If a graphics GPU does its own internal POST of the graphics adapter, its also unlikely to tell you, it wont be displayed? I wait to be contradicted on this..... |
godfather (25) | ||
| 113589 | 2003-01-14 07:10:00 | Before dumping the motherboard try testing it 'on the bench' ie out side the case on an open surface where you can get to things easily. AT motherboards were a bit easier to test out on the bench with a spare power supply, but you can also do this with your ATX unit. The psu will probably have to be removed from the case together with the soft power switch to do this, so that the leads will reach the m/b. Probably your Athlon heat sink had a thermal pad which 'melts' under the action of heat and the force of the heat sink clip, so that only a microscopic film is left on the cpu. If you replace the heat sink, remove all trace of the existing stuff and recoat with a thin film of thermal grease. Quite a bit of force (16-24 lbs, about 10kg) is needed to fit the clip, so you have to be careful. It would pay you to test the board again with just the cpu, video card and memory, and check to see if you get a beep. If you do get a beep, then things are looking good, and you could carefully re-assemble it all in the case and try again. |
Terry Porritt (14) | ||
| 113590 | 2003-01-14 09:08:00 | Tried that Terry, no cigar there either. What gets me is that there are no beeps whatsoever, regardless of what's in or out. | antmannz (28) | ||
| 113591 | 2003-01-16 01:31:00 | An update for those of you following this. Tested the cpu in another mobo (offsite) and it was fried. Have now bought and installed a new mobo, cpu and ram. |
antmannz (28) | ||
| 113592 | 2003-01-16 02:07:00 | Wonder how it got fried? Anyway, hope your troubles end here. |
agent (30) | ||
| 113593 | 2005-01-23 19:03:00 | HI ALL, I have a bit of the sam,e problem, I have everything hooked up right, everything sounds and feels like a normal boot, but I can't get it to post. Hardware is working, most of it is new. I think the problem may be my vid card, but even then I can't get hte speaker to beep at me. I am sure the jumpers are set correctly. amd 1500 cpu asrock k7v4a+ mobo any ideas?? Thanks |
6658899 (2990) | ||
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