@vnman @VeteranGamer We have pretty much solved it! The screen is no longer going on and off! The only issue now is there is an occasional lightening bolt symbol in the corner. The battery is installed. There's not lightening bolt at all if the battery is installed and it's also plugged into a power...

@Derock89 -I have a few spare Banggood Power boost, PM me and I'll send you two... But why change the power boost when the amp is the problem? (I know that I said change the power boost to the one that capable of outputing more ampere). What is the amp that 1UP uses in his build? Is it stereo or mo...

I think you are the first to use pi 3 and HDMI. did you try the config.txt example to see if it helps with the power problem? I read somewhere in this forum that composite screen draws 430mA, which would means the HDMI screen draws much more. In your case you need to source a more powerful power bo...

I think you are the first to use pi 3 and HDMI. did you try the config.txt example to see if it helps with the power problem? I read somewhere in this forum that composite screen draws 430mA, which would means the HDMI screen draws much more. In your case you need to source a more powerful power bo...

Does anyone know why putting resistors on the amp input worked, and which mA I should aim for reducing it to if this was a good fix? I was wanting some feedback from you guys before I consider this a solution and go through with it. My shipment of 1/4 watt resistors at 1% with 100 varieties of value...

I've done several experiments and found some interesting things. First I used a multimeter to test how much the Kedei HDMI screen is drawing. It appears to draw around 380 to 400mA. Next I tested how much the PAM8403 is pulling with the two 3W 4 ohm speakers and it jumps all over the place depending...

I also got a 50uF cap to put on the power rail. Do you know how this doesn't manage to draw a lot more power? I'm just reasoning that the power and ground rails are sort of being bridged with the cap. I realize tha cap has resistance in it I assume and that it's not bidirectional so I assume it won...

Sorry didn't realise that you don't intend to use headphones. I was thinking of using the headphones with switch such that you can cut out the output to speakers when headphones plugged in. Anyhow, the diagram above will reduced the output of the amp then you can connect the speakers to where it sa...

Yeah you could just put a small resistor in series with the potentiometer so there would always be some resistance. You'd have to test some values to find out what works. Or you could try powering the amp with 3.3v. On the input or output pins of the pot? What values do you think? I have some 1K an...

Just search for "PAM8403 Headphones amp" with Google, you need to turn the amp into headphones amp. This can be done with a few resistors and you can you switch headphones plug to mute the sound when headphones plugged in. In the mean time you can put these lines in config.txt to reduce the screen ...