|Is the "error message saying CMOS Battery Low " no longer appearing ? |
I don't have Windows 7 installed on any of my computers, but I do have Vista Home Premium installed on one and most things in Vista are identical to the same things in Windows 7.
I briefly see a flashing hyphen top left on a black screen just after the bios's POST completes before the Vista operating system starts to load - that's normal - but the operating system loads no problem after that.
If that flashing hyphen top left on a black screen happens for a longer time, then the operating system loads fine, or if the flashing hyphen top left on a black screen stays on the screen and the operating system doesn't load after that, intermittently, then you may have a minor hardware problem, or a problem with something that normally loads in the operating system before you see any indication of that on the screen.
If that's caused by a minor hardware issue, it may be caused by...
- a poor connection of the ram in it's slot(s)
See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:
- There is a poor connection inside your case somewhere.
Unplug the case/power supply, or switch off the AC power to it otherwise.
Power off your monitor.
Open up the case by removing the left side panel as seen when you're looking at the front of the case.
Check all the connections of the wiring to make sure they are all the way onto their pins and into their sockets, especially the main connector from the power supply. The wires close to the mboard going into the main power connector/socket should be more or less perpendicular to the mboard surface rather than at an angle.
Make sure all cards in slots are all the way down in their slots.
Check your SATA data cables. The connector on each end should "latch" into the socket on the drive and on the mboard, or on the drive controller card - it should not move when you merely brush your hand against it near the socket - if it does, mere vibration can cause a poor connection of it - use another SATA data cable that does "latch", or tape the connector in place.
(There is a slight projection or bump on one side of the outside of the connector that "latches" it into the socket - it's easily broken off or damaged)
The same thing applies for the SATA power connection.
Check your IDE data cables if that applies.
It is common to un-intentionally damage IDE data cables, especially while removing them - the 80 wire ones are more likely to be damaged. What usually happens is the cable is ripped at either edge and the wires there are either damaged or severed, often right at a connector or under it's cable clamp there, where it's hard to see - if a wire is severed but it's ends are touching, the connection is intermittent, rather than being reliable.
Another common thing is for the data cable to be separated from the connector contacts a bit after you have removed a cable - there should be no gap between the data cable and the connector - if there is press the cable against the connector to eliminate the gap.
80 wire data cables are also easily damaged at either edge if the cable is sharply creased at a fold in the cable.
Try another data cable if in doubt.
A problem with something that normally loads in the operating system before you see any indication of that on the screen is harder to determine.
E.g. that may happen if your computer is having problems with establishing a network connection, especially if the connection is wireless.