Matrix user forums

hello benj and matrix multimedia, I am very grateful, the last solution worked for me and my board is alive again. Thank you for the great support.

Thank you Benj, for your offer. Unfortunately I've made some hardware changes, which make my development board probably out of warranty. The changes are: de soldered multiplexer chip u3(did this before to read about mux burning fix) and two soldered capacitors instead 10uF ripple cap's. the time wis...

thanks for your quick reply Benj. i checked the jumper configuration - it is same. Forgot to tell you, that i tried with another brand new picmicros 12F675 and 16F684, ordered through Farnell together with your dev-board. I suspect that the problem comes from multiplexers U3 or U6 but can't be sure ...

first i want to thank you guys for the wonderful board - HP-488-00! in the beginning i met a problem with my ripple PSU, but i sort it out followed you advice in the forum. i started with programming in MPASM. had my LCD and ADC working on PIC16F88. it was working perfect to one week ago wen i tried...