Another BW screen question... Having trouble

[3kidsinaustin]

I have a new variant of the BW screen for my first GBZ build. There have been a couple of other postings on this screen the last month, and I thought I had it figured out. I first tried soldering a jumper from to pin 3 of the voltage converter and got intense flickering on the screen. So I removed the chip and powered it directly to pin 3 with 5 volts. Same result, screen flickers on and off constantly.

Tested with my multimeter and saw no bridged pads.

Any guidance out there? Would be greatly appreciated!

[3kidsinaustin]

This post from ibleedorange02 was what I followed after confirming +5v out on pin 3.

https://sudomod.com/forum/viewtopic.php?f=44&t=7052

And this pinout image he posted:

[3kidsinaustin]

Waiting for my pi to arrive so here is how I have been testing the screen - bench top power supply and the video output from an xbox through its component cable.

This setup worked flawlessly for 12V, but have the constant flickering at 5V. Could the lower voltage be getting interference because the ground signal is coming from the power supply instead of the video source?

[3kidsinaustin]

My two pi zeros arrived today, so I went to the test bench with the display to see if powering directly from the pi and its video output would do the trick.

Yes! Certainly enjoying this first, small victory.

Working display

20190103_134640.jpg (4.58 MiB) Viewed 4400 times

If doing again, I would first try soldering just to the leg of pin 3 of the 8-pin chip. Removing the chip wasn't too bad of a process, something I had not done before.

My temporary wiring below. The video signal is on the 22 gauge yellow wire on the far right. I used the power and ground going to the board and soldered them in per Fleder's terrific wiring guide. https://sudomod.com/forum/viewtopic.php?t=958

Temporary wiring

20190103_135541.jpg (4.11 MiB) Viewed 4400 times

Now a long wait for all the parts to get here!

And no idea why my pictures are upside down. Anyone have a suggestion?

[rodocop]

to rotate the display, add this line to the config.txt

display_rotate=2

[3kidsinaustin]

to rotate the display, add this line to the config.txt

display_rotate=2

Thanks! The display is ok, just the pictures I posted here to show are upside down.

Great tip though! I will keep this note just in case. I made sure to mark the screen with Top and an arrow to minimize any errors during assembly!

[rodocop]

to rotate the display, add this line to the config.txt

display_rotate=2

Thanks! The display is ok, just the pictures I posted here to show are upside down.

Great tip though! I will keep this note just in case. I made sure to mark the screen with Top and an arrow to minimize any errors during assembly!

Oh ahah, I didn't even realize the images you posted were upside down, my bad Either way good to know the display rotate line. I always install my screens with the ribbon at the top of the gameboy, which means you need to rotate it.

[3kidsinaustin]

Good tip on the ribbon cable, looks like I WILL be using that command line!