Arcade Collecting > Merit/JVL Touchscreen

raidion mobo's

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mahkeymike:
I yank them off of old mobo's.

ed12:
glad to know i am not alone in that 1 .. :cheers: :cheers:
ok did the power monitioring thing
the rails are all fine


ed

ed12:
ok do not cast his in stone just yet...
but here we go
removed sa0356-01 jumper
it goes from j2-2pin to the power sw
test board #1 will boot right into merit..ever time...
had the same problem with a nasty ion,removed the jumper,never a call back..
so what give's ?,do i need to break out the logic anaylizer to trace route.?
repeating test over the last hour..boot's right to merit every time..
what give's ?

ed

ed12:
ok i have not as of yet with trace routing found what is causing it.?
but these board's >tester's i have here,with the jumper removed will boot every time..
here is what i did
went to bios >delete<
on these board's
told it to error only on keyboard/hdd error
do not display bios chk.
saved
removed jumper
will boot every time to merit
screen will go blank 5-7 sec's >normal<
then go right to looking for boot media..
this is the exact result i had from the ion i did over a year ago..
man i have q's
traced it back to the bios chip with the logic interface >looking at 16 channels<
with the jumper 1 channel went flat line,with it un-hooked,it did it's proper timming..??

ed










,

lilshawn:
Doublecheck the CPU. if it's been overheated they do all sorts of weird stuff.

if you take out the CPU and flip it over and look at the bottom side, if it's been really overheated you can see the substrate board the CPU die is on is discolored. I swap those CPUs out. they get flakey.

while you are at it, scrape off that stupid aluminum/graphite thermal interface material they use on the heatsink. all it's good for is to keep your temps UP. replace it with some good silicone based grease.

also reset the BIOS with the jumper....replace the BIOS battery with a brand new one....  then go into the bios and load the "fail safe defaults" and then load the "optimised defaults" and reboot and let the software reset the BIOS settings.

this fixes all kinds of junk too. damn bios data gets corrupted on them.

be sure the system reset/power wire is hooked up properly too (should have a single black wire to the front panel connector then stops at a 2 pin connector just to the side of that one, and then off to the IO board)

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