|A common thing that can happen with ram, even ram that worked fine previously, is the ram has, or has developed, a poor connection in it's slot(s). |
This usually happens a long time after the ram was installed, but it can happen with new ram, or after moving the computer case from one place to another, and I've had even new modules that needed to have their contacts cleaned.
See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:
Asus M5A97 PRO AMD 970 (Socket AM3+) DDR3 Motherboard
No onboard video
All Solid Capacitor
Uses 100% All High-quality Conductive Polymer Capacitors
OCZ ModXStream Pro 600w Silent SLI Certified
Output+3.3V@25A, +5V@25A, +12V1@25A, +12V2@25A, -12V@0.3A, +5VSB@2.5A
PCI-Express Connector 1 x 6-Pin, 1 x 6+2-Pin
Parts 3 years limited
Labor 3 years limited
Radeon HD 6850
■500 Watt or greater power supply recommended
Probably has two 6 pin power sockets on it.
- are using the 1 x 6-Pin, 1 x 6+2-Pin connectors from the power supply to connect to the two power sockets on the HD 6850 card and they're all the way into their sockets....
- have checked the two power connections - to the 24 pin socket and the 4 or 8 pin socket - on the mboard to make sure they're properly seated...
If cleaning the contacts on the ram and re-seating it doesn't help, it's quite possible one of the two +12v output sections of your power supply is failing , or the power supply is otherwise defective.
Is the PS's fan blowing air out of the back of the case when the computer is running ? If it isn't, the PS components have probably overheated and have been damaged.
If you can try connecting a power supply from another working system that has a 500 watt capacity or greater, try connecting that.
"PC recently decided it wasn't going to recover from sleep mode on a regular basis and then from boot either. "
The computer system cannot stay in "sleep" mode.
You can have problems with Windows not recovering from Standby or Hibernate modes, if you installed Windows from scratch and did NOT load the main chipset drivers for the mboard after Setup was finished, but in any case, if you hold the power button in or down until the computer shuts off, the system cannot be in "sleep" mode when you start up the computer again.
If the computer will not start normally in that situation, something else is wrong.
"Tried the most popular fix (remove battery, set BIOS to default settings, replace battery).:
That's a popular myth.
Settings in the bios have got nothing to do with whether the computer itself boots (passes the post) normally, unless improper settings have been used by the computer user for overclocking the cpu and/or the ram that they cannot support.
If the computer EVER works fine with whatever settings it presently has in the bios, your problem is NOT caused by bios settings.
The computer should boot normally even when there is no Cmos battery installed, although you will get a message Cmos Checksum Error or similar because the time and date have been set back to defaults.
It was probably merely a coincidence that you doing that allowed the computer to work for a short time after that.