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Screen problems
Posted: Tue Oct 30, 2018 7:08 pm
by Firescore
When ever I connect my board to the screen with the ribbon cable I just get nothing, just black. Occasionally I will get a faint long beeping noise and if I REALLY fiddle with it i will occasionally get a flash of a pale white screen. I have no idea how to fix this or what I did wrong as I have checked all of my soldering several times and all of the connections are good even with the screen when I hook it up.
This is a link to a video that I made showing off what is happening along with my soldering
https://drive.google.com/file/d/1JtkHDW ... OYUnC/view
Re: Screen problems
Posted: Tue Oct 30, 2018 11:21 pm
by Helder
You need to make it easier for us to see the video and other things. Don't use private Google drive links if you want any kind of help from people.
Re: Screen problems
Posted: Wed Oct 31, 2018 12:08 pm
by VeteranGamer
Firescore wrote: ↑Tue Oct 30, 2018 7:08 pm
When ever I connect my board to the screen with the ribbon cable I just get nothing, just black. Occasionally I will get a faint long beeping noise and if I REALLY fiddle with it i will occasionally get a flash of a pale white screen. I have no idea how to fix this or what I did wrong as I have checked all of my soldering several times and all of the connections are good even with the screen when I hook it up.
This is a link to a video that I made showing off what is happening along with my soldering
https://drive.google.com/file/d/1JtkHDW ... OYUnC/view
only going by what the video shows....
if you believe everything is soldered correctly (taking your word for this)
firstly connect everything up
(thats the screen to the ribbon cable, the ribbon cable to the mintyPi board)
reformat your SD card, and install a fresh mintyPi V4 .img
(insert the newly installed SD card to the Pi Zero)
Now
connect the power and see what happens....
if this all fails...
well then its over to Helder
.
Re: Screen problems
Posted: Wed Oct 31, 2018 12:18 pm
by Helder
Firescore wrote: ↑Tue Oct 30, 2018 7:08 pm
When ever I connect my board to the screen with the ribbon cable I just get nothing, just black. Occasionally I will get a faint long beeping noise and if I REALLY fiddle with it i will occasionally get a flash of a pale white screen. I have no idea how to fix this or what I did wrong as I have checked all of my soldering several times and all of the connections are good even with the screen when I hook it up.
This is a link to a video that I made showing off what is happening along with my soldering
https://drive.google.com/file/d/1JtkHDW ... OYUnC/view
First and foremost you plug everything in after you connect the LCD board to the Main PCB otherwise the LCD will not come on at all. It need to be connected during boot and will show the back light once it reaches a certain point in the boot process like 30 or so seconds. You are not doing this as it's clearly shown in the video.
Re: Screen problems
Posted: Wed Oct 31, 2018 1:40 pm
by Firescore
Ok so i plugged the Screen into the Board with the ribbon cable before I plugged it into power and waited about five minutes and still nothing happened. I also know my img works because if I plug it into my monitor it boots up and I am able to use it.
Re: Screen problems
Posted: Wed Oct 31, 2018 2:02 pm
by Movie002
I am having a similar problem, except mine was working fine until I did a hard shut down. (Unplugged the power cable.)
Update: I fixed my issue it, turned out that the ground pin was not soldered to the button pcb correctly.
Re: Screen problems
Posted: Thu Nov 01, 2018 1:29 am
by VeteranGamer
Firescore wrote: ↑Wed Oct 31, 2018 1:40 pm
Ok so i plugged the Screen into the Board with the ribbon cable before I plugged it into power and waited about five minutes and still nothing happened. I also know my img works because if I plug it into my monitor it boots up and I am able to use it.
i would still suggest to reformat and install a fresh .img
(starting a fresh never hurts)
but more importantly, check you soldering...
they screen/board is not a complicated bit of equipment that could have issues with it....
if its not getting the correct and proper connections, then it just wont function as it should....
check you soldering.....
(start specifically with the screen connection point.... reflow if need be)
.
Re: Screen problems
Posted: Thu Nov 01, 2018 1:27 pm
by Helder
Check continuity from the Pi GPIO to the LCD test points, one of the pads is mislabeled on the LCD board but it's easy to see which it is.
Also redo a few GND points like the GPIO below the A button GPIO, it's an extra GND and might fix your problem.
Re: Screen problems
Posted: Thu Nov 01, 2018 1:34 pm
by Firescore
VeteranGamer, where is the screen connection point located and im assuming you would check for continuity with a multi meter
Re: Screen problems
Posted: Thu Nov 01, 2018 1:47 pm
by Firescore
Ok so i checked the connection with the LCD test points on the button pcb and the screen and they show continuity. I also re soldered a few of the extra GND points and it is still not working.