Area 51 Site 4 ... No picture, sound

happy4444

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hillsborough, New Jersey
Just picked up an area 51 site 4. My problem is when i start it up nothing happens on the screen or sound. I hear the screen turn on, stay on and turn off with that white flash in the middle like a TV, the board LED lights up, and everything looks fine. I unplugged and replugged all connections.

Tested voltage and these are the numbers i have..

AC in is 126v

Dc...
when 12v is adjusted to exactly 12v the 5v reads 5.67v
when the 5v is adjusted to exactly 5v the 12v reads 10.31v
are these numbers ok enough to at least have a picture on the screen?

a computer wiz friend of mine is going to check the hard drive for me tomorrow, but if thats fine the only other thing it could be is the board rite?

any help would be great...

thanks guys!
 
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If you have a computer wiz you're in luck - the site 4 board is more or less a PC motherboard paired to a jamma interface.

The 5.61v is very iffy, I wouldn't run it that high. Although this is a hungry setup I think that Atmel chip on the jammit board is very voltage sensitive. If it goes you'd be better off just finding another jammit board. The only place I know that has the image/chips to fix them is Betson.

The easiest thing to check...there's a 2 wire connector going from one board to the other. This is the watchdog - it tries to reset the motherboard if it detects it locked up, but apparently its a pita on these boards, and most people don't plug it in right either. Try just unplugging that to see if you get anything. Don't mistake it for the audio wire which is closer to the gap between the two boards. The 2 wire plug goes near the jamma plug if I remember correctly.

If you can find an AT computer power supply you can also try that right to the motherboard side to see if it boots. Have the tech check the fan on the CPU and try re-seating the memory sticks. If you unscrew the jammit(jamma) board from the metal plate..you'll see you can plug in a regular computer monitor into the motherboard side. Get that to boot before anything else.
 
If you have a computer wiz you're in luck - the site 4 board is more or less a PC motherboard paired to a jamma interface.

The 5.61v is very iffy, I wouldn't run it that high. Although this is a hungry setup I think that Atmel chip on the jammit board is very voltage sensitive. If it goes you'd be better off just finding another jammit board. The only place I know that has the image/chips to fix them is Betson.

The easiest thing to check...there's a 2 wire connector going from one board to the other. This is the watchdog - it tries to reset the motherboard if it detects it locked up, but apparently its a pita on these boards, and most people don't plug it in right either. Try just unplugging that to see if you get anything. Don't mistake it for the audio wire which is closer to the gap between the two boards. The 2 wire plug goes near the jamma plug if I remember correctly.

If you can find an AT computer power supply you can also try that right to the motherboard side to see if it boots. Have the tech check the fan on the CPU and try re-seating the memory sticks. If you unscrew the jammit(jamma) board from the metal plate..you'll see you can plug in a regular computer monitor into the motherboard side. Get that to boot before anything else.


thanks for the response, ill let you know how i make out
 
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