gcain
New member
Hi Everyone,
Signed up because I have this 3208-B board I cannot work out...
One-wire circuit operates as expected (green then orange light all good).
[FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Fan spins on high, never chimes or posts and of course, no backlight. IMHO, the CPU gets too hot quite quickly...[/FONT]
[FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]C.S. not liquid damaged, but the board was really dirty and needed a really good clean. IMHO it was liquid damage from humidity.[/FONT]
On R7402; Pin 2 == 8.4v and R7402 Pin 1 == 340mV.
The resistance of R7402 == 91.3k and should be 90.9k, so it's right which makes me reluctant to replace it...
I changed R7402 just to test and get the same measurements.
[FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Another interesting issue is that when I measure[/FONT] Probe 152, Pin 1 on U6990, it causes the fan to slow down to about half speed. Then it builds its way back up again.
Does anyone have any suggestions?
Signed up because I have this 3208-B board I cannot work out...
One-wire circuit operates as expected (green then orange light all good).
[FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Fan spins on high, never chimes or posts and of course, no backlight. IMHO, the CPU gets too hot quite quickly...[/FONT]
[FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]C.S. not liquid damaged, but the board was really dirty and needed a really good clean. IMHO it was liquid damage from humidity.[/FONT]
On R7402; Pin 2 == 8.4v and R7402 Pin 1 == 340mV.
The resistance of R7402 == 91.3k and should be 90.9k, so it's right which makes me reluctant to replace it...
I changed R7402 just to test and get the same measurements.
[FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Another interesting issue is that when I measure[/FONT] Probe 152, Pin 1 on U6990, it causes the fan to slow down to about half speed. Then it builds its way back up again.
Does anyone have any suggestions?