tony177, on 30 March 2012 - 06:26 AM, said:
That has been the scenario from the start - intermittent boot failure followed by booting with Windows CD enables subsequent successful normal boot. So, do any of you rodeo regulars interpret that general history supplemented with the specific sequence of actions and outcomes above as being indicative of or consistent with a hw problem? If so what hw problem specifically and if not, any idea what kind of other specific problem might be indicated.
Is the Windows CD "loud" when loading? (i.e. a lot of noise and vibration from the CD drive when it seeks files)?
If yes, it may
jaclaz, on 26 March 2012 - 12:06 PM, said:
tony177, on 26 March 2012 - 11:12 AM, said:
Anyone have any ideas as to what would intermittently cause the computer to behave like this and why the problem would be fixed after booting from the Windows CD in repair mode (does that replace some file(s) on the hard drive?).
I have seen defective hard disk cables/connectors behave like that.
but if you wish, I would throw in - without additional costs - also a cold solder joint anywhere on the motherboard or HD PCB.
dencorso, on 28 March 2012 - 09:13 AM, said:
+1. In other words: we here work by the Scientific Method
. We construct hypotheses (not necessarily always explicitly described) and propose experiments in order to validate or disprove them. Then the OP performs the tests suggested and reports back. Then, more refined hypotheses are thought up (not necessarily by the same person) and so on, until we get to understand what actually is happening, and then we move on to solution. Without experiments we simply cannot help.
That's the "normal" approach.
You well know how In some cases - when the post date+time sums up to an even number bigger than 6
- I draw randomly a new thread and in it, instead of posting the usual good advice, I simply throw on the table a few (sometimes wild, sometimes educated) semi-random guesses
, and then let the OP choose among them which ones he/she feels better with or is more convenient to him/her.
Other times I simply post real tall stories and see if the newcomer "buys" them
Once upon a time there was a PC that could not boot from it's internal hard disk.
This happened some times, and some other times the PC booted normally.
The queer thing was that just by inserting in the CD-ROM drive an XP install disc and bootng from it (but not doing any repair - or more generally operation from it) the next time the PC would boot normally.
When the PC doesnt boot it shows however a message "disk read error occurred", but right after a boot CD was just loaded it started booting normally again.
After some time of tests (new tests, not always the same ones) it was found how the vibrations induced to the case by booting from a CD made a false contact somewhere in the hardware "behave" (temporarily).
The actual cause was never found, nor the problem solved, as the PC's owner found it not convenient (due to a bad back medical condition) to actually doing the only logical thing, i.e. to open the case (and while at it cleaning it's internals), and try re-seating cables/cards/RAM etc. and visually inspect the parts before re-assembling...
both the PC and it's owner nonetheless lived happily ever after, with the only issue that the bad back problem became worse and worse each time the user had to bend to insert a boot CD to revive the stoopid PC....