A few months ago, a friend of mine who sells arcade cabinets and pinballs with his company "Rastermania", gave me a Merit Megatouch XL for free, mentioning that it was "as is" and came with no warranty. I didn't know then it would become a work intensive project to get it in complete working order.
From the beginning the machine threw up random errors (which, after further diagnosis and hours of hard work, turned out to be the flash memory chip being broken) and we noticed that the original CRT monitor was starting to die (making whistling noises and giving scrambled visual). Soon, after fixing all the boot- and software errors, we decided to replace the CRT monitor with an LCD replacement.
It took many hours of research; there was not much we could find about replacing the CRT monitor (and certainly not with an LCD). Finally, I found this topic and told me what to look for on Ebay. I decided to take the bet and invest 300 USD in buying an LCD monitor (price includes shipping from the USA to Belgium). I went for a ELO ET1715L-7CWA-1-G 17" Touch Screen.
After its arrival, the next challenge began: mounting it into the Merit cabinet. I decided not to remove the whole CRT monitor, but to leave its "frame" (which holds the CRT's electrical connections with the Megatouch PC) in place and mount an 1.8cm thick wooden plate on that frame, which is the mounting point for the new ELO Touch Screen (via its VESA mounting points). I also removed all cables leading to the CRT and the original Microtouch Touch Controller, however, I re-used the original power cable (with a new connector) to make the screen power up when you turn on the cabinet. Below you can find some pictures that I took while "renovating" the cabinet:
The CRT monitor frame, seen from the front of the cabinet (without the CRT monitor itself):
The CRT monitor frame, seen from the back of the cabinet (with the wooden plate in place - you can see the 4 screws (M4, 30mm in length) which hold the new LCD monitor in place via its VESA mounting points):
The wooden plate, secured to the CRT monitor frame with new nuts and bolts (you will need 4 M5 nuts which are at least 30mm in length, with corresponding bolts):
The new ELO Touch Screen in place:
The cabinet working with the new LCD (don't forget to recalibrate the touch screen when you power up the cabinet for the first time after replacing the monitor):
Hope this helps everyone with the same issue. Don't hesitate to contact me via email (wesley[at]portugaels[dot]be) if you have any further questions regarding this project.