Arcade Collecting > Merit/JVL Touchscreen

Megatouch XL - motherboard ??

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cush:
Hi,
Just got hold of a merit megatouch XL it looks like the older version from what I have read so far.
I am getting the disc boot failure which from what I can find may be a motherboard problem.The pdf for megatouch classic mentions that this error is a Telco motherboard issue.
In the footnote it says that dipswitches ds2 & ds3 must all be in off position, then it says early I/O boards have ds1 and 1,4 & 8 must be off. Where Im getting confused is it also states early boards have the blue volume disc too. Mine has the volume disk but does not have the ds1 only ds2 & ds3.
Is there anything I can do to eliminate I/O or Motherboard as problem ? I have never had any of these machines before so forgive my newbie status.

ed12:
ya there is alot u can do to deduce your problem
1=reseat the ram,take it out clean it,i use an eraser on the coper pins,next reseat it,
2=remove i/o header card ,it is the 1 the i/o board plugs into,repeat the cleaning process on the pins of it,reseat it to make sure it is tight
2=do the same to the actual i/o card
3=remove button bat if yours has 1 ? and push dowm on the center pin as to tighten it
4=make sure all fans are working right and that the 1 over the micro is not cloged
5=make sure your power supply is working right +5 and +12
6=make sure the ide cable is tight on both ends
7=turn all dip switchs off,then try a boot,see what it dose
8=if problem is still there turn power off,turn dip switch4 and 8 on
reboot machine and see what it dose
these are the basic steps

ed

cush:
Thanks for your reply.
I have taken all the boards out to clean them all up as the whole thing was caked in dust.
I cleaned the ram and riser along with the I/O board and even took out the u12 and then reseated it.
I will give your other suggestions a go now, when you say try 4 and 8 on which bank does this need to be done on ds2 or ds3 or both ?
Thanks.

cush:
right just tried the switches by putting 4 & 8 on ds2 on - still same
then both banks with 4 & 8 on - still same
then ds3 with 4 & 8 on - still same.
psu wise I put red probe on yellow wire at mainboard connector and other to ground = -4.88 that seem right only just noticed minus ?
then red probe on red wire (same connector) and ground = 5.04
Also tried molex yellow wire & grnd = 11.94
Not sure if I have done that properly if not any advice appreciated.

ed12:
hold on here
your probes to the meter must be reversed
black=ground=same with the machine
red=+5v this is where your probe should find it
yellow is +12volt this is where your probe should find it

2nd remove all cd's from this unit
u are doing a : restore:,2 banks of 4 1 bank of 8
the bank of 8 should be all off if everythink is ok
4 and 8 on to do the restore

now if was caked in dust..no suprise there
u might do well to go get a 1oz of silcon :heat sink compond:,
remove the heat sink of off the micro,clean off the old stuff both the top of the chip and the heat sink,re apply fresh stuff.

now a neat test here
is to remove old hard drive,and insert any hard drive that has a running o/s..i use a 98 drive for this as it is not fussy where it is hooked to
this will tell u your board is truly booting..

now side note here replace the cmos bat,as it will be on its way out

ed

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