W-tom,
Thanks again,
I haven't yet gotten to it with a meter. But trying to diagnose from the
symptoms.
The reset only occurs when a disc (albeit any disc type) is put into the DVD
burner drive. A disc inserted in the reader drive has no adverse effect. The
PC runs normally if no disc is inserted in the burner.
The reset occurs sometime after the draw has closed upto 20 seconds, so the
drawer has closed and the drive light gone out well before.
Sometimes there is no reset.
If the disc is already in the drive (and the drawer closed) when the PC is
booted then it may still reset.
The reset does not occur at the same point in the boot sequence, but more
likely at roughly the same interval after the disc was inserted.
So if it is in at the earliest point then the reset may occur at the Windows
logo screen. But if inserted later the reset may occur after the desktop has
appeared and been populated with icons. Once the PC has been fully started,
regardless whether minutes or hours, if the disc is inserted then the reset
may occur at around 20 seconds.
My point here is that if there was a power issue then the power drain by
inserting the disc and it being 'read' would surely cause a reset there and
then! But it seems more like that some other situation checks if a disc is
in the drive and that 'decides' to reset.
The voltage variations in the BIOS setup were within 0.02 volts of the
target. But as you suggest they are not accurate these are irrelevant.
I have looked at some of the error codes but they translate to a non
specific cause 'system error'!
Thanks I appreciate your help
Nigel
I have looked at the voltages showing in the BIOS SETUP and they show
generally within .02 of the target figures. Going by that it would seem
the
PSU is upto it. I also have no other problems and this problem does not
effect the DVD burner in any other ways i.e., it burns!
0.02 percent or volts or what?
BIOS is only a voltage monitor. Until calibrated with a multimeter,
then voltages are not known. It would be rare to the point of
complete doubt for all voltages to be that accurate (if volts).
However if voltages remain that constant both when first booted as
well as when the actual measurement must be made (when multitasking to
all peripherals simultaneously), then a power 'system' problem is
unlikely. Most important are actual voltage numbers (to hundredths of
volts) from red, orange, yellow, and purple wires.
Your problem is why more responsible computer manufacturers provide
comprehensive hardware diagnostics. If your computer manufacturer is
not, then download those diagnostics from component manufacturers or
from third parties. Windows and hardware work around problems
meaning that hardware tests using Windows are not sufficiently
informative. For example, a completely defective power supply can
still boot a computer. Hardware diagnostics are designed to see that
failure without complications from Windows and others. Idea is to
break a problem down into each part; then analyze only that part.
Testing hardware is performed best without Windows loaded which is why
better manufacturers provide the comprehensive hardware diagnostics.
Nothing in a DVD drive can (normally) cause Windows to reboot. That
is another feature of these OSes. If the DVD diagnostic executes
without Windows, then what does diagnostic see when the DVD is loaded?
Now we have established something that is still completely unknown
into something 'definitively good' or 'definitively bad'. IOW
progress is now made.
I am troubled by this sentence:
... it reboots at different points dependent on when the
disc is inserted.
What is ongoing in each instance? Why do you conclude a disc
loading is the common factor? And what does the event (system) log
and Device Manager report?
Meanwhile, how much does each BIOS measured voltage change between
computer operating idle verses a full multitasking test (complex
graphics displayed, while CD-rom is read, while internet is
downloading, while sound card is output changing sounds, while files
on hard disk are being read constantly, while ... ) Also important
are not a summary of voltage numbers. Necessary for better replies
are actual numbers for each voltage before and during that
multitasking test. Your replies will only be as useful as information
provided.