Power-up problem

  • Thread starter Thread starter William
  • Start date Start date
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William

I am experiencing the following problem when starting up my computer early
in the morning (after a complete shutdown and power-off during the night)

When I press the start up button for the first time nothing appears to
happen. When I wait a while (several minutes) and repeat this a few times
the computer starts normally. During the rest of the day no problem occurs.
The following morning however the problem comes back.

I have thought of the following possible causes: fault in the button, fault
in the motherboard, fault in the PSU.

I have tried to examine the start up button, but this being located in such
a position in my computer case (Aopen) , that inspection or replacement is
totally impossible, which in fact means that I would have to obtain a new
case.
There has been no change in the hardware or software for the past month.
 
Hi,

Most likely this is a PS issue. There is a leaking capacitor that cannot
build up the initial voltage needed to actuate electrical feed. Push again
after the first charge has built up and the cap charges a little more so
that the gate opens and other key voltages are allowed to go.
I've had this happen on a PS where first thing in the morning one would
push the machine on and it would turn off 15 sec later. Wait a minute and
push it again and it would run for 5 min. Push again it would run for 10
min. Push again and it would run for the rest of the day. Changing the PS
did the trick.

Good luck,
 
I am experiencing the following problem when starting up my computer early
in the morning (after a complete shutdown and power-off during the night)

When I press the start up button for the first time nothing appears to
happen. When I wait a while (several minutes) and repeat this a few times
the computer starts normally. During the rest of the day no problem occurs.
The following morning however the problem comes back.

I have thought of the following possible causes: fault in the button, fault
in the motherboard, fault in the PSU.

I have tried to examine the start up button, but this being located in such
a position in my computer case (Aopen) , that inspection or replacement is
totally impossible, which in fact means that I would have to obtain a new
case.
Click to expand...

Not impossible, most likely you merely need remove the front
(plastic) bezel to access it. However, if the button still
has a definite mechanical clicking action (perhaps a click
sound), and the button easily releases and springs back, AND
it doesn't help if you push the botton harder- then it's not
likely to be the button.

As Jan mentioned, it's more likely a capacitor(s) aging or
failing. Examine the motherboard- if you see vented
capacitors, replace the board. Otherwise it's more likely
the power supply.

You might also check cards and cables, just in case some
make poor contact.
 
kony said:
Not impossible, most likely you merely need remove the front
(plastic) bezel to access it. However, if the button still
has a definite mechanical clicking action (perhaps a click
sound), and the button easily releases and springs back, AND
it doesn't help if you push the botton harder- then it's not
likely to be the button.

As Jan mentioned, it's more likely a capacitor(s) aging or
failing. Examine the motherboard- if you see vented
capacitors, replace the board. Otherwise it's more likely
the power supply.

You might also check cards and cables, just in case some
make poor contact.
Click to expand...

Thank you all for your reactions. I have just determined that the
powerswitch did not make a proper contact and needs to be replaced, which
due to the poor construction, unfortunately means replacing the case with a
better quality power button. I have now ordered a Lian Li V1100 case, which
is a bit expensive but solid.
 
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