Hello,
Background
Specs:
MB: (OEM) Asus M2NS-NVM/S
CPU: AMD Athlon 64 x2 6000+ 3.0GHz
RAM: 4x Crucial DDR2 667MHz 1GB
HDD: Seagate Barracuda 7200.9 160GB
GPU: nVIDIA inno3D 9600 GT 512MB
PSU: Corsair (CX750) 750W, updated in last month from Thermaltake 500W
About 5 years I bought a cheap Packard Bell (iStart 1380) desktop and then updated its CPU, GPU, RAM and PSU a few months after.
In the last month or so I bought a new HSF for the CPU and GPU. The PSU wasn't quite sufficient for the new heat sink fans, as demonstrated by the extreme (65C to 80C) temperatures of the motherboard. I bought a new PSU (Corsair 750W) and the temperatures don't exceed 65C now. Specifically, while I had the insufficient PSU, when I placed a case fan above the RAM to the right of the CPU (shown below), the temperatures dropped considerably:
Before the HSFs were upgraded, the GPU fan vibrated the whole computer (and the CPU HSF didn't cool the CPU enough).
Problem
While I had the old HSFs (in their last days), the computer sometimes wouldn't start and sometimes would.
Presently the computer doesn't POST unless I clear the CMOS RTC RAM data each time (by removing the battery and jumping the pins). In addition, when I do start the computer via this method, there is a high pitched noise which doesn't come from the HDD or PSU. Is it possible that it's coming from the BIOS chip? I also read it might be a capacitor on the motherboard.
Another point is that when I restart the computer within the next minute of it being switched off, it works. It's only after roughly 10 minutes that the computer fails to POST (but the CPU and PSU fans run).
What I've done (to no avail)
Note: every time I touch the computer components I first switch off the PSU by its own switch and press the front panel button to discharge excess static charge. I then touch a metal part of the case with my hands.
- Started the computer with one of my 4 RAM sticks in each slot and used memtest86+
- Replaced the PSU with a Corsair 750W (see background)
- Switched the CPU for its single-core equivalent
- Breadboarded the computer
- Put a humongous desktop fan in front of the opened-up computer at start-up to check if something overheated immediately (I also tried out a powerful case fan)
- Tried resetting the BIOS to defaults and saving
- Tried starting the computer without the GPU, i.e. with onboard graphics: nVIDIA 6100
- Replaced the CMOS battery
- Removed and replaced one RAM stick multiple times to eliminate oxidation possibilities
- Tightened cable connections
I've postulated that the BIOS is corrupted due to either the old vibrating GPU fan or the previous (see background) motherboard overheating problem or because of one of the SpeedFan & HWMonitor programs that I installed. Though I doubt it would be SpeedFan because I've had that for over a year.
One question that keeps cropping up is: why does resetting the RTC RAM data always allow me to restart the computer? Surely the data remains the same when I shut down the computer because there's a CMOS battery for that purpose.
Given the fact that Packard Bell no longer even acknowledge the existence of my type (iStart) of computer and that the motherboard is an OEM one, so Asus don't offer support for updating it and Phoenix requires you pay the price of a new motherboard to get a BIOS update, I don't really have the option to update the BIOS. So, how does one go about buying replacement BIOS chips, if that's what I need?
Any solutions or advice would be greatly appreciated.
Thank you,
Candidium
Background
Specs:
MB: (OEM) Asus M2NS-NVM/S
CPU: AMD Athlon 64 x2 6000+ 3.0GHz
RAM: 4x Crucial DDR2 667MHz 1GB
HDD: Seagate Barracuda 7200.9 160GB
GPU: nVIDIA inno3D 9600 GT 512MB
PSU: Corsair (CX750) 750W, updated in last month from Thermaltake 500W
About 5 years I bought a cheap Packard Bell (iStart 1380) desktop and then updated its CPU, GPU, RAM and PSU a few months after.
In the last month or so I bought a new HSF for the CPU and GPU. The PSU wasn't quite sufficient for the new heat sink fans, as demonstrated by the extreme (65C to 80C) temperatures of the motherboard. I bought a new PSU (Corsair 750W) and the temperatures don't exceed 65C now. Specifically, while I had the insufficient PSU, when I placed a case fan above the RAM to the right of the CPU (shown below), the temperatures dropped considerably:
Before the HSFs were upgraded, the GPU fan vibrated the whole computer (and the CPU HSF didn't cool the CPU enough).
Problem
While I had the old HSFs (in their last days), the computer sometimes wouldn't start and sometimes would.
Presently the computer doesn't POST unless I clear the CMOS RTC RAM data each time (by removing the battery and jumping the pins). In addition, when I do start the computer via this method, there is a high pitched noise which doesn't come from the HDD or PSU. Is it possible that it's coming from the BIOS chip? I also read it might be a capacitor on the motherboard.
Another point is that when I restart the computer within the next minute of it being switched off, it works. It's only after roughly 10 minutes that the computer fails to POST (but the CPU and PSU fans run).
What I've done (to no avail)
Note: every time I touch the computer components I first switch off the PSU by its own switch and press the front panel button to discharge excess static charge. I then touch a metal part of the case with my hands.
- Started the computer with one of my 4 RAM sticks in each slot and used memtest86+
- Replaced the PSU with a Corsair 750W (see background)
- Switched the CPU for its single-core equivalent
- Breadboarded the computer
- Put a humongous desktop fan in front of the opened-up computer at start-up to check if something overheated immediately (I also tried out a powerful case fan)
- Tried resetting the BIOS to defaults and saving
- Tried starting the computer without the GPU, i.e. with onboard graphics: nVIDIA 6100
- Replaced the CMOS battery
- Removed and replaced one RAM stick multiple times to eliminate oxidation possibilities
- Tightened cable connections
I've postulated that the BIOS is corrupted due to either the old vibrating GPU fan or the previous (see background) motherboard overheating problem or because of one of the SpeedFan & HWMonitor programs that I installed. Though I doubt it would be SpeedFan because I've had that for over a year.
One question that keeps cropping up is: why does resetting the RTC RAM data always allow me to restart the computer? Surely the data remains the same when I shut down the computer because there's a CMOS battery for that purpose.
Given the fact that Packard Bell no longer even acknowledge the existence of my type (iStart) of computer and that the motherboard is an OEM one, so Asus don't offer support for updating it and Phoenix requires you pay the price of a new motherboard to get a BIOS update, I don't really have the option to update the BIOS. So, how does one go about buying replacement BIOS chips, if that's what I need?
Any solutions or advice would be greatly appreciated.
Thank you,
Candidium