Native Instruments Maschine MKII Displays Not Working properly

This happened to me twice. - Maschine Mikro MK1.

1. 1 I opened mine up to clean, put everything back together, lights up, no text. Reopened & found the inner ribbon from the display wasn't properly inserted into the clamp down section on the board. Opened the clamps & inserted the ribbon as far as it would go before closing the clamps down. To help me hold the ribbon in the small slot while pulling the 2 clamps down at the same time, I taped the ribbon down 1st in the position & then closed the clamps (have to close it simultaneously to lock else 1 corner of the ribbon pops out, or the opposite side of the clamps pops UP if 1 side is pushed down as the clamp is a single white horizontal bar that slides down to lock). Leave the tape in place as this prevents the ribbon slipping out. Be VERY careful when opening or closing the bar, ESPECIALLY when opening cos I pulled it out of the fitting it pops into, & it is only probably 1.5mm "thick" & 2 cm in length. This process where the ribbon slots into & gets clamped down is the exact process 1 would do when cleaning your laptop keyboard (it also has a ribbon that connects to the m/board via a similar clamp down slot. Difficulty 5/10.

1. 2 Didn't open it to clean but same symptoms - Opened & found USB connector solder points were loose (The amount of solder used is way too little), giving intermittent connectivity, soldered it but not well bc had trouble with my gun, bought 2 new USB connectors (1 as a spare), took it to an Electronics / Hobbyist store (they do alotta soldering), explained to the guy what was wrong & he sorted it in 2 minutes - that was +5 years ago & its still working. Keep in mind, bc he wouldn't know about the display ribbon, & he would've DEFINITELY broken it had he opened it & lifted the board out - instead, I disassembled & re disassembled it for him to prevent any damage AND bc there's alot of screws. Only charged me R20 (1.053 USD). To alleviate this, I've put a plastic block around the USB connector hole to make it deeper (like the KKM32) to prevent side to side & top to bottom movement & taped most of the USB cable to the unit to prevent any movement. To make this even better, a USB cable with a right angled connector plugging into the unit works very well. If you can't find 1 with the proper amps, get 1 made, most times you can get a high quality cable made for a lower price than 1 bought over the counter. Difficulty 2/10.

1. 3 Possibly it could just be a cable problem, so swop out & test FIRST & then refer to 1.1 & 1.2

There are vids demonstrating the disassembly. Else take it to any electronics store - a motherboard is a motherboard & ANY electronics store solders 100% of the time, it's literally what they do. Only reason why I suggest you do the disassembly is to avoid damaging the ribbon or the clamp down bar. Other option is to show them the video of the disassembly, so that they can do it & be aware of the ribbon, they'll have 1 look & know EXACTLY how to do it, as ALL electronics (laptops, tvs, etc) have these parts on the motherboards - if you do not clean your laptop keyboard yourself, then the IT guy that you / your employer utilizes to service your IT hardware, will also be able to do this. Sooner or later you WILL have to open your Maschine to clean inside bc the pads & all other buttons will get sticky / less responsive - the longer you wait to clean it, dust will build up & create friction between the underside of the pads / buttons, conductive sheet & the motherboard, which will lead to the PCB paint getting scratched off, in turn leading to less / no response at all.