**The post will sound fairly long-winded as I've decided to detail my experiences with the issue and the various means that I have tried to troubleshoot the problem. The description will sound a lot like a HDD/PSU issue but it will make sense to be in this forum at the end**
I've got a problem that quite a few people on this forums have encountered -- The CPU being switched on and not executing the boot sequence at all. Nothing on screen, no sign of life on miscellaneous USB powered devices like the Keyboard and Mouse, but you hear the whirring from the CPU that sounds intense and does not die down, like it normally would. It takes a few reboots and switching off/on of the CPU before (by luck?) it works and boots up normally. No noticable error messages are displayed. Upon inspection of the CPU, it can be seen that the fans are working, except for the motherboard fan, which seems to spin up, then halt. Spin up and halt. A slight clicking noise can be heard, but no beeps.
For the TL;DR version, scroll to bolded portion at bottom.
There are a few common symptoms before this boot problem arises (split into mutually exclusive pts, unless listed split alphabetically):
1a. The usage of an external Hard Disk shows signs of power but is not detected by windows. It also causes explorer.exe to hang. A few normal restarts of the computer gets it to function normally.
1b. HDD gets detected and functions without any problems. After "Safely Removing" the device and shutting down the computer (without turning off the Mains), attempting to power-up the CPU causes the boot problem.
2. Windows suddenly hangs. (Can either be with a external HDD connected or recently ejected) No BSoD, no input captured by mouse / keyboard, monitor completely frozen. Computer will then fail to boot completely.
Solutions that have been attempted:
I first tried to narrow down the problem to make sure it was not a Hard Disk error.
- Testing of HDD on a separate computer -- Works perfectly all the time. Therefore, no faulty cable, no virus etc.** A thing to note is that on my other computer, it only takes 1 USB slot on the cable to get the HDD working. On my current computer, it takes 2 and still has a chance of not working.**
- Reformat of the computer. Thinking some bug might have been caught in the 1yr+ of no reformatting, I tried a full reformat. I also purchased a brand new 1TB HDD which I also upgraded my OS from Vista to Win7 on.
- Getting advice that booting issues are most commonly caused by a faulty / burnt out PSU (I leave my computer on through the night sometimes), and that many people with this problem have done the same, I replace my 550V PSU with a slightly superior 600W one.
Things start looking good. In Windows7, the hard disk although sometimes still undetectable, does not cause Windows Explorer to hang any longer. I begin to suspect that the USB ports at the side panel is having a problem powering up the HDD so no big issue, just a matter of using the rear USB slots.
A few days of use later however, the problem returns and I'm baffled. I find a temporary solution though:
Upon using an external device and shutting down, to get the computer to complete a boot sequence at the next startup, I have to perform a power cycle and/or discharge the electricity (switch off PSU and turn on computer) before the computer will boot properly.
How do I solve this final problem? I find it especially heart-breaking to have to replace expensive parts due to a small hitch like this.
I've got a problem that quite a few people on this forums have encountered -- The CPU being switched on and not executing the boot sequence at all. Nothing on screen, no sign of life on miscellaneous USB powered devices like the Keyboard and Mouse, but you hear the whirring from the CPU that sounds intense and does not die down, like it normally would. It takes a few reboots and switching off/on of the CPU before (by luck?) it works and boots up normally. No noticable error messages are displayed. Upon inspection of the CPU, it can be seen that the fans are working, except for the motherboard fan, which seems to spin up, then halt. Spin up and halt. A slight clicking noise can be heard, but no beeps.
For the TL;DR version, scroll to bolded portion at bottom.
There are a few common symptoms before this boot problem arises (split into mutually exclusive pts, unless listed split alphabetically):
1a. The usage of an external Hard Disk shows signs of power but is not detected by windows. It also causes explorer.exe to hang. A few normal restarts of the computer gets it to function normally.
1b. HDD gets detected and functions without any problems. After "Safely Removing" the device and shutting down the computer (without turning off the Mains), attempting to power-up the CPU causes the boot problem.
2. Windows suddenly hangs. (Can either be with a external HDD connected or recently ejected) No BSoD, no input captured by mouse / keyboard, monitor completely frozen. Computer will then fail to boot completely.
Solutions that have been attempted:
I first tried to narrow down the problem to make sure it was not a Hard Disk error.
- Testing of HDD on a separate computer -- Works perfectly all the time. Therefore, no faulty cable, no virus etc.** A thing to note is that on my other computer, it only takes 1 USB slot on the cable to get the HDD working. On my current computer, it takes 2 and still has a chance of not working.**
- Reformat of the computer. Thinking some bug might have been caught in the 1yr+ of no reformatting, I tried a full reformat. I also purchased a brand new 1TB HDD which I also upgraded my OS from Vista to Win7 on.
- Getting advice that booting issues are most commonly caused by a faulty / burnt out PSU (I leave my computer on through the night sometimes), and that many people with this problem have done the same, I replace my 550V PSU with a slightly superior 600W one.
Things start looking good. In Windows7, the hard disk although sometimes still undetectable, does not cause Windows Explorer to hang any longer. I begin to suspect that the USB ports at the side panel is having a problem powering up the HDD so no big issue, just a matter of using the rear USB slots.
A few days of use later however, the problem returns and I'm baffled. I find a temporary solution though:
Upon using an external device and shutting down, to get the computer to complete a boot sequence at the next startup, I have to perform a power cycle and/or discharge the electricity (switch off PSU and turn on computer) before the computer will boot properly.
How do I solve this final problem? I find it especially heart-breaking to have to replace expensive parts due to a small hitch like this.