[Ken[_6_]]

I have a HP Touchsmart 300-1020 computer that has no video and no
audible error code. The PS seems to be providing proper power for much
of the MB, its fans, its DVD, and HD. It has a APP78-CF mother board
that uses an AMD Athlon II x2 4200+ processor in an AM3 socket. I first
searched for some documentation on the processor since there is no heat
being generated by it, and that would mean it was not running. But it
is not available as far as I could find. (Years ago such info was
easily found on smaller processors.) My purpose was to determine where
the clock pulse was and to determine if the processor voltages were
present. I probed the MB and found the core voltages around the
periphery of the socket, so I think the processor is getting the proper
voltages. There is a clock generator chip on the MB (SLG8LP625T) and a
search for the pinouts also came up empty. I did determine it needed
3.3 volts however, and it appears to have it. Probing the clock
generator chip with my scope leads me to believe that the chip is not
running, as there are no active leads on it.

So my question is: Does the clock generator chip free run, or is it
enabled by some lead? Years ago it was free running on older MBs. I do
not intend to try to replace the chip, but I would like to know if it
has what is needed before I give up on the MB.

[Maynard A. Philbrook Jr.]

In article , says...

I have a HP Touchsmart 300-1020 computer that has no video and no
audible error code. The PS seems to be providing proper power for much
of the MB, its fans, its DVD, and HD. It has a APP78-CF mother board
that uses an AMD Athlon II x2 4200+ processor in an AM3 socket. I first
searched for some documentation on the processor since there is no heat
being generated by it, and that would mean it was not running. But it
is not available as far as I could find. (Years ago such info was
easily found on smaller processors.) My purpose was to determine where
the clock pulse was and to determine if the processor voltages were
present. I probed the MB and found the core voltages around the
periphery of the socket, so I think the processor is getting the proper
voltages. There is a clock generator chip on the MB (SLG8LP625T) and a
search for the pinouts also came up empty. I did determine it needed
3.3 volts however, and it appears to have it. Probing the clock
generator chip with my scope leads me to believe that the chip is not
running, as there are no active leads on it.

So my question is: Does the clock generator chip free run, or is it
enabled by some lead? Years ago it was free running on older MBs. I do
not intend to try to replace the chip, but I would like to know if it
has what is needed before I give up on the MB.

Check your power switch and circuit ?

Jamie

[Ken[_6_]]

Maynard A. Philbrook Jr. wrote:
In article , says...

I have a HP Touchsmart 300-1020 computer that has no video and no
audible error code. The PS seems to be providing proper power for much
of the MB, its fans, its DVD, and HD. It has a APP78-CF mother board
that uses an AMD Athlon II x2 4200+ processor in an AM3 socket. I first
searched for some documentation on the processor since there is no heat
being generated by it, and that would mean it was not running. But it
is not available as far as I could find. (Years ago such info was
easily found on smaller processors.) My purpose was to determine where
the clock pulse was and to determine if the processor voltages were
present. I probed the MB and found the core voltages around the
periphery of the socket, so I think the processor is getting the proper
voltages. There is a clock generator chip on the MB (SLG8LP625T) and a
search for the pinouts also came up empty. I did determine it needed
3.3 volts however, and it appears to have it. Probing the clock
generator chip with my scope leads me to believe that the chip is not
running, as there are no active leads on it.

So my question is: Does the clock generator chip free run, or is it
enabled by some lead? Years ago it was free running on older MBs. I do
not intend to try to replace the chip, but I would like to know if it
has what is needed before I give up on the MB.

Check your power switch and circuit ?

Jamie

If you mean does the power switch turn on power? The answer is Yes. If
you mean something else, please elaborate. I can turn on and turn off
power, the processor does not seem to be running.

[[email protected]]

There is like a method to PC TShooting.

Pull all the cards except video.
If it has onborard video pull any video card and hook monitor to built in video.
try another power supply.

IF IT DOES NOT BEEP :

Remove all cards including video.
Remove all drives, even the USB card reader.
Remove ALL RAM.
Try another power supply.

One of those three actions should make the mobo beep. If not, the mobo itself as well as the processor are in question and at that point if it isn't too old you got so many options.

Make a new build, reregister the same OS, use the old RAM and drives, case all that ****.

Find a way to determine for sure if it is the processor, mobo or both. If not both, replace the bad one and you are all set. It CAN be both. I have seen where a processor shorted out and burned its socket, which is not replacable. So that is that.

But generally it is one or the other. usually there is only one main problem with anything. It may have caused more, but...

NOW, I forgot to mention something, when you pull all the cards and ****, remove the CMOS battery after that. Then try it again. See, WHEN IT BEEPS is what tells us what is wrong.

AND, in case you caught a BIOS virus (been there done that) when you see "CMOS CHECKSUM FAILURRE, DEFAULTS LOADED" is usually when you got it really fixed. Been there a few times. (when will I ever learn just to say NO when someone wants to touch my PC ?)

That's pretty much the scoop. Much more requires equipment, training, all kinds of ****.

And BTW to the people who say "CHECK THE POWER SUPPLY VOLTAGES CHECK THE POWER SUPPLY VOLTAGES !" I say this, "Just change the ****ing power supply". Now if that is not possible at the moment, DO look up the pinout fo the ATX PS and check the voltages. but I like to knoiw quicker, just plug a new one in and let it hang off the side or whatever. You get a display, beeps, whatever, then you know.

Bout it for now. Get thorugh that and keep us "posted"...

[Ken[_6_]]

wrote:
There is like a method to PC TShooting.

Pull all the cards except video. If it has onborard video pull any
video card and hook monitor to built in video. try another power
supply.

IF IT DOES NOT BEEP :

Remove all cards including video. Remove all drives, even the USB
card reader. Remove ALL RAM. Try another power supply.

One of those three actions should make the mobo beep. If not, the
mobo itself as well as the processor are in question and at that
point if it isn't too old you got so many options.

Make a new build, reregister the same OS, use the old RAM and drives,
case all that ****.

Find a way to determine for sure if it is the processor, mobo or
both. If not both, replace the bad one and you are all set. It CAN be
both. I have seen where a processor shorted out and burned its
socket, which is not replacable. So that is that.

But generally it is one or the other. usually there is only one main
problem with anything. It may have caused more, but...

NOW, I forgot to mention something, when you pull all the cards and
****, remove the CMOS battery after that. Then try it again. See,
WHEN IT BEEPS is what tells us what is wrong.

AND, in case you caught a BIOS virus (been there done that) when you
see "CMOS CHECKSUM FAILURRE, DEFAULTS LOADED" is usually when you got
it really fixed. Been there a few times. (when will I ever learn just
to say NO when someone wants to touch my PC ?)

That's pretty much the scoop. Much more requires equipment, training,
all kinds of ****.

And BTW to the people who say "CHECK THE POWER SUPPLY VOLTAGES CHECK
THE POWER SUPPLY VOLTAGES !" I say this, "Just change the ****ing
power supply". Now if that is not possible at the moment, DO look up
the pinout fo the ATX PS and check the voltages. but I like to knoiw
quicker, just plug a new one in and let it hang off the side or
whatever. You get a display, beeps, whatever, then you know.

Bout it for now. Get thorugh that and keep us "posted"...

I appreciate your suggestions, but this MB has everything built in and
things like the video card cannot be removed. I agree that most often
the problem is one item, and that is why I was trying to determine if
the clock generator should be free running. I have cleared CMOS and
some of the other suggestions you made along with removing the MB from
the unit and inspecting for damaged components. Everything points to
the processor chip not running even though it has the voltages it
requires. I tried another processor and again there was no activity by it.

My hope was that someone would have some insight to the clock generator
chip, as that would tell me if the problem was it or before it. Thanks
for your suggestions.

[chuck]

On Tue, 2 Dec 2014 19:07:22 -0800 (PST), wrote:

There is like a method to PC TShooting.

Pull all the cards except video.
If it has onborard video pull any video card and hook monitor to built in video.
try another power supply.

IF IT DOES NOT BEEP :

Remove all cards including video.
Remove all drives, even the USB card reader.
Remove ALL RAM.
Try another power supply.

One of those three actions should make the mobo beep. If not, the mobo itself as well as the processor are in question and at that point if it isn't too old you got so many options.

Make a new build, reregister the same OS, use the old RAM and drives, case all that ****.

Find a way to determine for sure if it is the processor, mobo or both. If not both, replace the bad one and you are all set. It CAN be both. I have seen where a processor shorted out and burned its socket, which is not replacable. So that is that.

But generally it is one or the other. usually there is only one main problem with anything. It may have caused more, but...

NOW, I forgot to mention something, when you pull all the cards and ****, remove the CMOS battery after that. Then try it again. See, WHEN IT BEEPS is what tells us what is wrong.

AND, in case you caught a BIOS virus (been there done that) when you see "CMOS CHECKSUM FAILURRE, DEFAULTS LOADED" is usually when you got it really fixed. Been there a few times. (when will I ever learn just to say NO when someone wants to touch my PC ?)

That's pretty much the scoop. Much more requires equipment, training, all kinds of ****.

And BTW to the people who say "CHECK THE POWER SUPPLY VOLTAGES CHECK THE POWER SUPPLY VOLTAGES !" I say this, "Just change the ****ing power supply". Now if that is not possible at the moment, DO look up the pinout fo the ATX PS and check the voltages. but I like to knoiw quicker, just plug a new one in and let it hang off the side or whatever. You get a display, beeps, whatever, then you know.

Bout it for now. Get thorugh that and keep us "posted"...


You are spot on about just changing the power supply instead of
testing voltages. Voltages will check fine on some Dell computer
power supplies but the computer won't boot. The problem is the power
supply. My guess is that the supply fails when current draw increases
on start up.

[Ken[_6_]]

chuck wrote:
On Tue, 2 Dec 2014 19:07:22 -0800 (PST), wrote:

There is like a method to PC TShooting.

Pull all the cards except video.
If it has onborard video pull any video card and hook monitor to built in video.
try another power supply.

IF IT DOES NOT BEEP :

Remove all cards including video.
Remove all drives, even the USB card reader.
Remove ALL RAM.
Try another power supply.

One of those three actions should make the mobo beep. If not, the mobo itself as well as the processor are in question and at that point if it isn't too old you got so many options.

Make a new build, reregister the same OS, use the old RAM and drives, case all that ****.

Find a way to determine for sure if it is the processor, mobo or both. If not both, replace the bad one and you are all set. It CAN be both. I have seen where a processor shorted out and burned its socket, which is not replacable. So that is that.

But generally it is one or the other. usually there is only one main problem with anything. It may have caused more, but...

NOW, I forgot to mention something, when you pull all the cards and ****, remove the CMOS battery after that. Then try it again. See, WHEN IT BEEPS is what tells us what is wrong.

AND, in case you caught a BIOS virus (been there done that) when you see "CMOS CHECKSUM FAILURRE, DEFAULTS LOADED" is usually when you got it really fixed. Been there a few times. (when will I ever learn just to say NO when someone wants to touch my PC ?)

That's pretty much the scoop. Much more requires equipment, training, all kinds of ****.

And BTW to the people who say "CHECK THE POWER SUPPLY VOLTAGES CHECK THE POWER SUPPLY VOLTAGES !" I say this, "Just change the ****ing power supply". Now if that is not possible at the moment, DO look up the pinout fo the ATX PS and check the voltages. but I like to knoiw quicker, just plug a new one in and let it hang off the side or whatever. You get a display, beeps, whatever, then you know.

Bout it for now. Get thorugh that and keep us "posted"...


You are spot on about just changing the power supply instead of
testing voltages. Voltages will check fine on some Dell computer
power supplies but the computer won't boot. The problem is the power
supply. My guess is that the supply fails when current draw increases
on start up.

Replaced the PS, a good thought however. This still leads me back to a
clock generator that is not showing any leads moving. The processor
cannot begin to function without a clock pulse. My biggest problem is
not being able to find any documentation for the processor or the clock
generator. Unlike days of old when such info was available, the
manufacturers only give it to those purchasing (or about to purchase) a
large number of their devices today.