The original display for KROME/KROME-EX has been replaced by the new type, and the old one is no longer available. Old display type: 510313503502 HS700V12B New display type: 510313503508 HS700V12B A In order to replace the old LCD with the new LCD, you need to replace the LCD interface board KLM-3164 as well. The KLM-3164 board is included in the following set of boards: 510C80443120 KROME KLM-3120/21/36/64 ASSY So, when you replace the old LCD with the new LCD, please order the following two as a set: 510313503508 HS700V12B A 510C80443120 KROME KLM-3120/21/36/64 ASSY Note that KROME-EX produced around July 2021 and later have the new LCD and LCD interface board (KLM-3164) installed at our factory. If these newer KROMEEX require LCD replacement, then just replacing the LCD is fine. No LCD interface board replacement is required. The serial numbers of KROME-EX produced with the new LCD and IF board are as follows: KROME-61-EX 39522 - 39550 (29 units) 39574 - 39588 (15 units) 39590 - 39611 (22 units) 39613 & 39614 (2 units) 40593 and after KROME-73-EX 20347 and after KROME-88-EX 21780 and afte