jonkull

That's fine. Here is as good as anywhere. Yes it's the same one I requested to sell last year only last year it was in a more 'unfinished' state. I ended up putting it together, playing with it for a couple weeks and sticking it in a closet. LCD would work for a few minutes then flash random characters. Then it went blank after a while. I was going to make a new cable and order a backup LCD but never got around to it. Right now it's functional as a synth...it just has no display. I'll take some pictures and put together a description and add them tonight or tomorrow. Jon

Hello. I have a mostly finished MB_Sid I'd like to sell. Everything on it works except the LCD. I was never able to get it going. It's been sitting in a closet for the last few months. I've put about $350 USD into the project. I'd like to put it on ebay for BIN $200 USD just to make back some of my money. This is a one time sale. I will not be building any more. Thanks.

I have decided not to build my MB6582 and would like to sell the 2 panels and 2 PCBs for what I paid for them. Is this OK? Jon SOLD

I'd love a kit and PICs. Thanks.

I'm one of those people. The last panel I had made was $125. With panels for (possibly) $10 I can't pass it up.

Sorry I was out most of the weekend. I didn't see any error messages...the upload appeared to go correctly. I'll try the device_id.hex tonight and see what happens. I don't remember the bootloader version (1.9c maybe)...it was whatever was current back in Nov. Now that I have a new PicKit 2 I'm going to reflash the PIC with the current bootloader and see if that helps. In the meantime I'm going to reinvestigate shorts. I noticed an IC with a bent pin that looked like it was seated properly but wasn't. That didn't fix the issue with the LCD though. I wish I had a way to test the LCD itself...maybe it's defective and I'm wasting time with everything else. In either cas the MBSid is playable and controllable via midi...I just have no display which is an annoyance but not the end of the world.

Well I updated to 1.9e and 1.7303 and now all I get is a completely blank screen. No random characters or anything else. Haven't tried the 2.0 beta yet.

OK. I'll run the updates when I get home and get back to you. Thanks for all the help.

I'm using MIOS 1.9c. I have to check the firmware version...I'm at work. I'm waiting for a PicKit 2 to come in the mail. When I get it I'm going to update everything and also try my other PIC chip. I have a 18F452 at home. Not sure if it's compatible with a 18F4620 or not though... Maybe I need to build a new core?

When I powered my MBSid up this morning the LCD was working fine again. I turned it off and back on and it's back to random garbage. Neither...I'm using a 18F4620. As for the strings of characters...when I send them from MIOS studio all I get is random garbage. Nothing repeats. For example sending 00000000 gets a completely different result every time it's sent. However the characters I described in my previous post are constant.

As it boots it shows $$$ on top right and $f7477. on bottom right. After it's done booting it shows $$lgteT$lenf54 on top line and $f7477.5V$DMWlovet on bottom line. It's always the same. As I cycle through the patches the characters change as I turn the knob. None of the text is anything readable as far as names or actual words. For instance patch #1 shows ---5 on the top line with nothing on the bottom line. There's no consistancy between patches...they all appear different but each patch remains constant. For example when I scroll back to patch 1 from patch 2 it goes back to ---5.

I no longer think it's heat as my LCD is now permanently filled with random characters. The unit is still functional..responds to midi and produces audio the LCD just doesn't work. I guess it's time to check the wiring...yet again. :(

Thanks for the response. According to the datasheet the maximum operating temp for the LCD is 50C (122F). My midibox is in an aluminum case with ventilation slots running across it's entire width of the back panel. The 7805 does have a heatsink on it. Maybe it's not pulling enough heat. I'll try connecting it to the case and see if that helps.

I'm wondering...can temperature cause something like this? Last night it was 85F in my apartment. This morning it's in the low 60s and the MBSid is working perfectly fine with no LCD strangeness. I had some issues with my Kurzweil randomly dumping it's presets last summer and was told that it was due to temperature (max temp for a kurzweil is 104F so if it's in a rack with poor ventilation and a bunch of gear all giving off heat...). Last night right after I made this post my K2600 dumped it's presets again. I noticed that my MBSid was pretty hot when I shut it off. Just a thought.

I finished building my MBSid this morning. It worked great for about 3-4 hours then the LCD suddenly filled with random characters. It responds to midi and produces audio and the buttons and knob appear to be working. I used MIOS Studio to reupload the mios and app and received no errors. My display cable seems fine. I read another post here where someone had a similar problem and fixed it by reburning the PIC. I will not be able to do this for a few days. Is there anything else I should look at in the meantime?