Hi I've bought a prusa i3 from aliexpress from 3d star link below [m.aliexpress.com] It uses the mezli v2 board although it's marked as 3vb It has lost it's firmware ie blocks on the LCD display. It turned on once to the correct screen an just blocks after that. I've emailed the seller but the code they are sending me doesn't work. Also the instructions are terrible. I'm after any advice you can give me as I'm getting constant errors with their firmware. They've sent me the same code three times now and my time for opening a dispute is running out. Help I want to start playing with my Christmas present. Thanks in advance Scott https://reprap.org/forum/read.php?406,605809,605809#msg-605809 Wed, 22 Jul 2026 03:42:40 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?406,605809,606545#msg-606545 https://reprap.org/forum/read.php?406,605809,606545#msg-606545
This lcd often referred as 2004 lcd controller or reprap discount lcd controller. Uncomment the line stating reprap discount controller.

Also not to forget to copy some other settings from the seller like steps per mm, accel rate, pid values, thermistor type, and etc,

But not to copy all the config from the seller, it mostly won't compatible with the current marlin you use]]> sarf2k4 Prusa i3 and variants Fri, 08 Jan 2016 06:44:41 -0500 https://reprap.org/forum/read.php?406,605809,606239#msg-606239 https://reprap.org/forum/read.php?406,605809,606239#msg-606239 Thanks
Scott]]> Scottjar Prusa i3 and variants Thu, 07 Jan 2016 14:06:10 -0500 https://reprap.org/forum/read.php?406,605809,606153#msg-606153 https://reprap.org/forum/read.php?406,605809,606153#msg-606153 sarf2k4 Prusa i3 and variants Thu, 07 Jan 2016 10:52:58 -0500 https://reprap.org/forum/read.php?406,605809,605809#msg-605809 https://reprap.org/forum/read.php?406,605809,605809#msg-605809 [m.aliexpress.com]

It uses the mezli v2 board although it's marked as 3vb

It has lost it's firmware ie blocks on the LCD display. It turned on once to the correct screen an just blocks after that.
I've emailed the seller but the code they are sending me doesn't work. Also the instructions are terrible.
I'm after any advice you can give me as I'm getting constant errors with their firmware. They've sent me the same code three times now and my time for opening a dispute is running out.
Help I want to start playing with my Christmas present.
Thanks in advance
Scott]]> Scottjar Prusa i3 and variants Wed, 06 Jan 2016 18:42:04 -0500