Hi folks. Sorry for the long post, but humor me. Mike here. I'm brand new to this Robo3D Forum, but definitely not to the printers. To date, I've owned/own two Robo R1 Plus Printers. Both I've had for nearly 5 years, and they've always been amazing printers and a real pair of work horses. Incredibly happy with them. Each printer has MORE than carried its weight over the years. I guess I"m fortunate since the only parts I've ever had to replace are a hot end here, an extruder tip there, and one heated print bed. Long story short, "something" had me sold on the R1 Plus model. Enough to the point, where after owning my first R1 plus for only a year, I bought a second one just because. Plus to keep up with this crazy hobby. However........ These machines are starting to finally get finicky. (that's right, nearly 5 years and they just started to mess up)I spent all night tonight reading up on "stepper drivers" and the RAMPs boards, and especially the Driver boards. . It all started with a stubborn extruder stepper that cut out on me during a print. Now, I've dealt with the occasional filament jam, but quickly found out how to avoid those. Anyway, I read and "did" the support section of the Robo3D site, about swapping the wiring to test the stepper motor, using the software's X axis function, and the motor worked just fine. So, the next step, was to check the Driver Board....well, I have another identical R1 +, so I borrowed its driver board. No luck still!! So Now, I'm reading the RAMPs board is probably bad. So end of my long story here. I'm looking for some helpful tips, and maybe some advice. Both my printers still have strong stepper motors, but their wiring and "board stuff" is starting to show it's long usage I guess. Also, I should probably add, all that hardware was bone cold stock with no mods or upgrades. (Right from the factory) I'm looking at repair, or replace opinions. There's also a site called partsbuilt that offers a ton of stuff for these printers at what looks like reasonable prices. Not sure if it's a good source or not. Again, looking for opinions. Anyway, sorry for the long post, but just to give an idea of what my Robo R 1 Plus printers have done for me, here are some of my more "over the top" prints, and yes, they are all life size. Knowing that, and knowing that these printers have been going strong for almost 5 years.....well.......not sure how to proceed, but in the here and now......seems my RAMPs boards and Driver boards may be the culprit. Thanks for lending an ear guys and for any help. My 2 Robo R1 Plus printers have made SO MUCH, but below are my favorites. I've actually done 12 full scale Ghostbusters Proton Packs on the first R1 Plus Printer I bought. And below that pic is my full size Johnny 5 3d Print. I'll spare the thousands of other prints these printers have done. I know that I followed a strict preventive maintenance schedule for them......well..... I guess it paid off. Now just gotta find out how to get these printers up and running again.