Introducing the Colour Maximite 2

Author	Message
TassyJim Guru Joined: 07/08/2011 Location: Australia Posts: 6572	Posted: 03:23am 16 Jun 2020         GregZone said   But... No joy with the SD card. Reseating the Waveshare again gave me one good SD card session, but then just repeating red LED flashes again with "Check Disk". Continuity testing the relevant SD card Waveshare board pin connections, through the header socket (Waveshare board to bottom of PCB), showed a no-connect on the "PC10" pin. Re-soldered all the SD relevant header socket pins, which resolved the PC10 connectivity (so all SD Card related pins were now continuity checking Okay). But... again only a brief success with SD Card, before it's back to "Check Disk". Not sure what to try next? I'm thinking bad / poor quality 80 pin header sockets, making intermitent contacts? But, to try and desolder these (to try replacing them) is no small task! Any other ideas? Keen to get my CMM2 up and running. ps. I have also tried 3 different SD cards (Lexar / Sandisk), no luck. There are a couple of test you can do. Assuming you have micro SDcards with adapters, When you insert a card, the activity light should flash briefly. If it can't read the card, it should continue flashing every second or so as it polls the card looking for a valid card. So, start (or reset) the CMM2 without a card present. The activity light should be on constantly. Inset the adapter without a card. The activity light should flash briefly every second or so. If that happens, the card present circuit is working. Inset the card into the holder and the polling will stop and 'check disk' disappears. If that doesn't happen, the problem is with one of the control/data lines rather than the card present switch. This might help narrow down the culprit. Jim