I’ve bought a MK157 and assembled it but on tests nothing happens !
I’ve tested if there is 3V on the Vss and Vdd pins of the PIC -> Yes
All links are good
So, i tryed to read it with a PIC programmer but all bytes are “00”.
Can it be not programmed ??
If yes, where can I get the program to write it myself ??
PIC is protected, so it cannot be read.
Check if LCD receives +5VDC (see diagram)
Make sure all LCD lines are connected.
Check for shorts/damaged PCB pads/tracks
LCD receive any signals and didn’t turn off.
Normally, the PIC must turn on the LCD but it don’t work.
All tracks seems to be goods and all LCD lines are correctly connected.
I have exactly the same problem. I put the kit together but the LCD fails to switch on. Any diagram of hints?
The schematic is printed on the blistercard (next to assembly instructions)
We will check the production as soon as possible.
After control, the PIC controller is correctly programmed during the last production.
If you can’t find the problem you may also send us some picture (sharp!!) from your PCB (component and solderside).