I bought a kit code K8035.it worked for 2 days and then it broken.first the component DY3 returned the code 5, then press the various buttons, flashing the 0 on DY1 and DY2 sometimes the LED LD1 .
Can you help me understand what happened?
best regards
Flavio
Probably a false contact, or bad solder joint ?
Check also the XTAL and his startcapacitors C1 & C2