Modifications on my screen ? (Blue PCB) [Amazon.de, ePathChina]

[dirtybeagles]

I cleaned it up as best as I could and it did not improve my testing Screen still will not turn on.

48.jpg (99.99 KiB) Viewed 8912 times

[skrapps914]

I cleaned it up as best as I could and it did not improve my testing Screen still will not turn on.

48.jpg

very strange. i had a similar problem with the ada fruit screen. i mean, i had power, but it wouldnt give me the right picture. i had to reverse wires..put them into the av2 section, to get av1 signal. so odd. on top of that, i didnt notice i had a different board revision, so i had to un-solder everything, and start over lol. im new at this.

[Fleder]

I cleaned it up as best as I could and it did not improve my testing Screen still will not turn on.

48.jpg

Do you own a multimeter to check for continuity?

[dirtybeagles]

Do you own a multimeter to check for continuity?

Yeah, I tested the wire where it connects to the board and it is a solid 5v. I tested the jumper wire connected to pin2 and it is 5v as well.

[Fleder]

No, i mean, measure the solder pads where you soldered on the wires, if they are somehow connected.
Without power, of course. Do you know what i mean?
Check if you somehow accidently soldered one to the other. Because this is the same board that i got and mine worked fine witht his mod.

I will post a wiring diagram that i used in a few minutes, maybe you can try this.

[dirtybeagles]

No, i mean, measure the solder pads where you soldered on the wires, if they are somehow connected.

No problem, let me know if this is correct. I test three points. The two in the middle beep. The other ones just show a positive number. I also test voltage as well. I flipped the image around to match the orientation of the guide.

49.jpg (61.52 KiB) Viewed 8898 times

50.jpg (67.75 KiB) Viewed 8898 times

[Fleder]

No, i mean, measure the solder pads where you soldered on the wires, if they are somehow connected.

No problem, let me know if this is correct. I test three points. The two in the middle beep. The other ones just show a positive number. I also test voltage as well. I flipped the image around to match the orientation of the guide.

49.jpg
50.jpg

Yo you got a "beep" from 2 to 3 on the continuity check? This might be the problem. Try to desolder those 2 points completely (with soldering wick), so no solder is left and reattach the wire again, if they are no longer connected with solder.

[dirtybeagles]

Yo you got a "beep" from 2 to 3 on the continuity check? This might be the problem. Try to desolder those 2 points completely (with soldering wick), so no solder is left and reattach the wire again, if they are no longer connected with solder.

This image is after taking off the wire and cleaning up a little. I still get beeps though.

51.jpg (1.17 MiB) Viewed 8889 times

On this image, I tested the ground in the upper left while holding the red cable on the multimeter and I get a signal in the 1440 range.

52.jpg (1.09 MiB) Viewed 8889 times

Not sure I can clean it up anymore than what I have in picture 51

[skrapps914]

any luck figuring it out? looks like theres a glob of solder in some points that may be bridging a connection. i followed a trace with the red line and circled the glob. also circled what looks like 2 points might need to be a little cleaner. if you have a wick, use that and clear it out best you can