my sid is dead-strange symbols on my lcd(?)

MIDIbox SID
1

ok guys

as usual i have some problems

my last post was a problem (apparently) with the 1k pull up r2

i removed the old one with a brand new one

but now i don’t know what…

the lcd instead of the usual start up shows strange simbols or lines and nothing else

i tryed with another lcd but i got the same results

basicly all the problems started a while ago when i decided to upgrade my mono sid type c

with a new module

(i bought both kits at mike’s pcb shops)

so i updated one of the core with the new firmware, application

changed the id to the other one, firmware, application

removed the optocoupler

but together they never worked!!

(i also never solved the problem with mplab for my 16x2 lcd  ???)

then suddenly the problem with some midi out messages(1k pull up??)

and now i got this with the lcd

if i use mios studio i don’t get any request of upload

should i buy the jdm module and reburn the bootloader inside the pic

and reprogram everything from the beginning or is something easier?

let me know

2

another thing

if i try to upload the new mios( i tryed allthe 3 types)

using mios studio

i get something like

hex contains code in mios range forcing reboot!!

or it start to upload the first line and then nothing…i wait wait wait…

3

  1. You have a short in your pcb

  2. The lcd controller is broken (usually caused by a short)

4

mmmhhh…a short…

how can i fix it?

5

By checking all your connection for accidentily made solder bridges?

6

i checked more or less everything

and it looks ok, i’ll double check everything from the beginning

(it takes a lot for me to answer here because i don’t have internet at home

so all the times: go home, check and bla bla bla)

the doubt is that with all that changing id  to the cores and

tryng to upload the mios again, both cores are giving me the same results

with both lcds

and going back to the problem with that 1k pullup resistor

even if i changed it with a new one i still have that problem(my sid is slow)

even if the display doesnt show anything,

i can ear after a while the drop tune(really slow) and something that sound like formatting the bankstick(?)

let me know

thanx

there is the possibility that messing with the mios and the change id app.the two cores, i did the disaster

i also got a black out but not during the upload

to be shure that i don’t have short in the pcb wich connection should i check exactly?

i checked the connection of the pic and the optocoupler

ic1 pin 1 pin 12

ic1 pin 11 pin 12

ic1 pin 31 pin 32

ic 2 pin 5 pin 8

and on both cores i got 5v

so what else should i check?