A7S333 1 long beep 3 short beep and shut down ?

[bianchi77]

Guys,

I got Asus motherboard with :
A7S333 1 long beep 3 short beep and shut down ?

Is it a GPU problem ?
CPU fan is spinning...

Thanks

[R_J]

Re: A7S333 1 long beep 3 short beep and shut down ?

According to the manual, One Long beep followed by three short beeps means Video card not found or video card memory bad,
Try another agp video card or try a pci video card, try removing the memory and see what happens, I have seen memory and agp conflicts before, also try reseting the bios if you have'nt already

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

I removed everything still beep awhile and then completely shut off...is one of the FET faulty ? if I remove the CPU...it's running ok...the fan spinning and it's still on

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

any ideas with it ?

[R_J]

Re: A7S333 1 long beep 3 short beep and shut down ?

Are you removing 'G'pu or 'C'pu, post 1 said Gpu post 3 said CPU, If you removed the CPU and it works, I would check the fets around the CPU socket or your CPU could be bad

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

I removed all...CPU and GPU...fan is running without stopping...
but if I put CPU...it's running awhile then stop ...no GPU

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

I check Q3 and Q4 = 0V on the drain, it could be a death FET and caps...
3 caps are short...I will see if I remove them...what's the response on my DMM ??
I keeo posted...

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

nothing wrong with those FET or caps, I reckon the CPU is not right...
without CPU, fan can run ok, but after I put CPU...fan on for about 5 seconds voltage at 03 and Q4 is 1.7V which is CPU core and off....

[RJARRRPCGP]

Re: A7S333 1 long beep 3 short beep and shut down ?

I suspect the AGP slot... AGP systems seem finicky. It's not seeing a valid video card...

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

without AGP or anything, only CPU, power ON....few seconds fan rotating....and OFF
ok I will see with different VGA...
I keep posted..

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

Not working with different VGA....I can hear a beep...but power off ..
without VGA and memory....beep as well and power off..
CPU is not good...

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

I tried with different CPU, good one, but the symptom is the same....beep...fan spin and off...if I release the CPU....it's stable...any clues ?
I'll measure the voltage now...

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

I've found 1 diode 1N5817, forward voltage only 0.1V...
it could be the culprit ??

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

I want to replace it with 1N4007...

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

the caps with red line on top are failed on continuity test...
they're all beep very loud...
could it be the problem ?

but I can't see any bulge on top...
Have a look on the photos

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

it's 3300uF/6.3V

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

could it be because of low rpm CPU fan ? and there is no chassis fan and power fan..

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

Voltage measurement, PWM and zener photos...
Could it the problem with PWM and zener ?

Any clues ?
Zener = LM431ACT

[RJARRRPCGP]

Re: A7S333 1 long beep 3 short beep and shut down ?

it's 3300uF/6.3V

Are they KZGs? All 3300uF KZGs were visibly bad (bulged) on my Asus A7N8X-X! And that's when just sitting in the room of my former place!

[bianchi77]

Re: A7S333 1 long beep 3 short beep and shut down ?

Nope they are 5 dark purple Rubycon 3300 uF/6.3V capacitors...is it possible that my PWM is faulty ?