GM328 white screen

• GM328 white screen
  Posted by spikeyhair on 27 Feb, 2019 18:30
• Hi,
  
  I  probably have posted in the wrong section so sorry about that.
  
  However I have built one of those gm328 component testers and am getting a white screen on power up. Can some one help me out please?
  
  Things I have tried so far:
  

  • Checking mcu with avrdude using a usbtiny ISP. The chip wouldn't give a signature so replaced it with another m328p.
    
  • Tried flashing various fw from links in this forum.

  
  The version of product is the colour TFT gm328 with rotatory encoder and frequency generator. I got it from amazon. https://www.amazon.co.uk/KKmoon-Transistor-Capacitance-Frequency-Generator/dp/B01HCU8VTM/ref=sr_1_3?ie=UTF8&qid=1551291890&sr=8-3&keywords=kkmoon+gm328
  
  Hope someone can point me in the right direction with fault finding this? Hopefully I have built it correctly and its just a firmware issue?
  
  Cheers!
  
• #1 Reply
  Posted by Teledog on 28 Feb, 2019 04:03
• Definitely wrong zone, but ...are you using a decent power supply?
  Those kits are infamous for white screens when using crappy batteries.
  G'luck!:-)
• #2 Reply
  Posted by stj on 04 Mar, 2019 05:55
• it's NOT a GM328, those are green backlit monochrome.
  it's an "AY-AT" from some scumbag seller using the wrong description to get more search hits.
  
  the difference is important if you want to flash it - try AY-AT firmware.
  
• #3 Reply
  Posted by drescherjm on 18 Mar, 2019 19:39
• I had the same behavior on first power up of my GM328 2018 kit. The problem was fixed after I resoldered the male pin header for the display.