[solved] LCD problem on my MB-6582

MIDIbox SID
1

Hi,

It would be really nice if someone could point me in the right direction to my problem.

I got some problem with my lcd on my MB-6582, suddenly it only displays black boxes. What to do?

Could it be something on the basebord i need to fix? Or is it time to buy a new display?

I have built the baseboard and cs and everything have been working good.

Voltage checking, OK.

Testtone, OK

Uploading mios, OK

Playing some nice sounds, OK. Startup sound is working.

I have tested it with another lcd, same thing there. ( that one could be broken, last time i tested it was a year ago )

I use a c64 psu and it works good, and tested the voltage on the baseboard again and everything looks good.

I appreciate all the help i can get,

Thanks

/Rimfrost

2

did you try adjusting the contrast pot? failing that, maybe you could try plugging your lcd into a different core.

3

thanks for your reply nebula.

I have now tried all cores and adjusting the contrast pot, the lcd is working on core 3-4 and black boxes on core 1-2.

So it seams so be something wrong on core 1-2, i will look in to it later.

4

After taking a good look at the baseboard i found that 2 of the crystals were broken, brown/black stuff under them. Replaced one for a little test and now it’s working :slight_smile:

But i don’t know why they broke, does anyone have a clue?

5

Hi, maybe you overheated them during the soldering stage?

6

Hi, maybe you overheated them during the soldering stage?

It could be so, i tried to be careful and not overheat anything. Next time i will be extra carefull :slight_smile:

Right now i am happy that everything works, order new crystals today so hopefully i can replace them next week and completly finish this nice project:)