SouthCityHooiser
New member
Good afternoon all! First post to your great community!
I have a Megatouch ION with an asus motherboard that is refusing to start up.
I bought the unit about 8 months ago and it gets used about once a week for an hour or two, just at home...nothing too serious.
So we switched it on over the weekend and the DBA fired up but nothing else, no fans, no monitor. I'm fairly experienced with electronics and computers in general (at least I like to think so, ha), my first thought was the power supply, since the DBA was getting power but the PC portion didn't seem to start.
Its clean on the inside and I can't see any disconnected or mis-seated cables, buldging caps or anything obvious like that.
So I disconnected the power supply from the unit and jumped pins 14 (/PS_ON) and 15 (GND) together and was a bit surprised when the fans spun up (on the power supply, its a normal 20-pin ATX style).
The power supply actually looks really good, considering some I've seen in the past. I wouldn't doubt it if was previously replaced. Tested all the pins and they all seem to have good voltage, according to this pinout
Okay, so after a bit of research on this site and others, it sounded like what the problem might be is the CMOS battery on the motherboard.
Pulled that and its dead. Way dead..like 0.1v dead.
Following this thread, when the battery dies you lose your BIOS settings. Including the auto-power-on setting when the motherboard starts after power is applied. All makes sense thusfar (user aginc in that thread had a ECS mobo, and i have an asus, but thats pretty standard behavior, i think).
So replace the battery, switch the unit on and nothing starts, as expected.
In order to get to the BIOS when I fire it up, I connect a PS/2 keyboard.
I jump the two pins together again and everything seems to start correctly. The motherboard's status light is green, all the fans are spinning, the display comes on.
Of course I'm not out of the woods yet...
The monitor is showing the 'Cable Disconnected dsub analog' error on the screen...basically what a normal monitor would call 'check signal cable'.
I connected an external monitor as opposed to the internal touchpanel to verify something else hadn't gone wrong, but alas, the same, no output to the external monitor.
After that, just for grins, I reseated the ram in case I bumped it or similar during my messing about. Same result.
I've seen some threads saying that on an ECS motherboard its is advisable to reset the CMOS via a jumper after replacing the battery, but I can't find anyone recommending that on a Asus board. But I figured that was pretty well standard behavior and did it according to the motherboard manual here, page 1-16.
I still can't seem to get any video output from the mobo on an external monitor or the internal touchscreen...sort of running out of ideas!
In the thread previously mentioned, user Nixs was saying that a jumper had to be added to the board, however I think this was for the ECS board and not sure if it applies to the asus board.
If anyone has any experience with these ION units, any advice or ideas are much appreciated! Thanks!!
I have a Megatouch ION with an asus motherboard that is refusing to start up.
I bought the unit about 8 months ago and it gets used about once a week for an hour or two, just at home...nothing too serious.
So we switched it on over the weekend and the DBA fired up but nothing else, no fans, no monitor. I'm fairly experienced with electronics and computers in general (at least I like to think so, ha), my first thought was the power supply, since the DBA was getting power but the PC portion didn't seem to start.
Its clean on the inside and I can't see any disconnected or mis-seated cables, buldging caps or anything obvious like that.
So I disconnected the power supply from the unit and jumped pins 14 (/PS_ON) and 15 (GND) together and was a bit surprised when the fans spun up (on the power supply, its a normal 20-pin ATX style).
The power supply actually looks really good, considering some I've seen in the past. I wouldn't doubt it if was previously replaced. Tested all the pins and they all seem to have good voltage, according to this pinout
Okay, so after a bit of research on this site and others, it sounded like what the problem might be is the CMOS battery on the motherboard.
Pulled that and its dead. Way dead..like 0.1v dead.
Following this thread, when the battery dies you lose your BIOS settings. Including the auto-power-on setting when the motherboard starts after power is applied. All makes sense thusfar (user aginc in that thread had a ECS mobo, and i have an asus, but thats pretty standard behavior, i think).
So replace the battery, switch the unit on and nothing starts, as expected.
In order to get to the BIOS when I fire it up, I connect a PS/2 keyboard.
I jump the two pins together again and everything seems to start correctly. The motherboard's status light is green, all the fans are spinning, the display comes on.
Of course I'm not out of the woods yet...
The monitor is showing the 'Cable Disconnected dsub analog' error on the screen...basically what a normal monitor would call 'check signal cable'.
I connected an external monitor as opposed to the internal touchpanel to verify something else hadn't gone wrong, but alas, the same, no output to the external monitor.
After that, just for grins, I reseated the ram in case I bumped it or similar during my messing about. Same result.
I've seen some threads saying that on an ECS motherboard its is advisable to reset the CMOS via a jumper after replacing the battery, but I can't find anyone recommending that on a Asus board. But I figured that was pretty well standard behavior and did it according to the motherboard manual here, page 1-16.
I still can't seem to get any video output from the mobo on an external monitor or the internal touchscreen...sort of running out of ideas!
In the thread previously mentioned, user Nixs was saying that a jumper had to be added to the board, however I think this was for the ECS board and not sure if it applies to the asus board.
If anyone has any experience with these ION units, any advice or ideas are much appreciated! Thanks!!
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