They all need control boards. These are available through Aliexpress
A couple need print heads. These are available through Aliexpress as well.
I would normally fix these up myself but I'm swamped right now. If I get a chance I'll take down this ad and do it myself. I also have a GX430t that needs a label sensor, possibly a main board. If you're interested let me know. Same price.
Not anxious to sell. I'm sure I'll fix them myself if they don't sell.
On display at 113 Souder Dr, Hurst, TX, call before you stop by 503 9545 area code 817 we're open M-Sat 9am-5pm