I've got my 4.3 royally messed up need help!


 
S

ShaneStemson

New member
Powers up can't use any buttons not getting 3.3v out of le1 off of the chip. Got it to link via hard wire but now that does not work. I'm in over my head need help thanks in advance. Red led doesn't work either but think that is le1.
 
You might not get any voltage out of LE1 if there's not a condition to light it (default is output at 100%). Here's a diagram of what voltages to expect everywhere to get you started:



Just to clarify, when you say "powers up" do you mean the HeaterMeter display lights up and says "- No Pit Probe -" or displays a temperature? Or do you mean just the Pi powers up and the HeaterMeter does nothing?
 
I have checked voltage and everything seems fine. As far as startup it will show no pit probe and read all probe temps but I cannot access any menus.
 
Well it seems like you've gone through the first two stages of fixing a HeaterMeter, anger and denial, which just leaves bargaining, depression, and acceptance :-D

If it is just the buttons then that's usually something easy to troubleshoot.
  • The #1 cause of buttons not working at all is the ground connection on the 1k resistor next to the LCD1F header on the base board. The pin closest to the 5V side of the header is the ground so first give that a good look over and maybe give it another shot with the soldering iron and see if that fixes it.
  • Check continuity from the ATmega BTN pin to the other end of that resistor, and the BTN pin on the header. Should read connected.
  • Stack the LCD/Button board on top and power up the HeaterMeter. Check the BTN pin on the Button board, should be 0V.
  • Hold down one of the buttons and test the voltage at the BTN pin on the LCD/Button board. Left=0.54V, Up=1.78V, Right=2.72, Down=1.02.
  • No voltage change? Signs point back to the 1k resistor back on the Base board, or the soldering on one of the two pin headers' BTN pins.
  • Not all buttons show voltage change? Check the corresponding resistor which should read 5V on both ends with no button pressed. Left=8.2k, Up=1.8k, Right=1.2k, Down=3.9k
  • Voltage does change appropriately but doesn't do anything? Check the soldering on the BTN pin of the ATmega on the Base board.
  • Weird voltage all the time? Power down and check continuity between the BTN pin on the LCD/Button board header and other pins to look for a short (which could either be on the male or female side)
 
got it

Bryan Mayland said:
Well it seems like you've gone through the first two stages of fixing a HeaterMeter, anger and denial, which just leaves bargaining, depression, and acceptance :-D

If it is just the buttons then that's usually something easy to troubleshoot.
  • The #1 cause of buttons not working at all is the ground connection on the 1k resistor next to the LCD1F header on the base board. The pin closest to the 5V side of the header is the ground so first give that a good look over and maybe give it another shot with the soldering iron and see if that fixes it.
  • Check continuity from the ATmega BTN pin to the other end of that resistor, and the BTN pin on the header. Should read connected.
  • Stack the LCD/Button board on top and power up the HeaterMeter. Check the BTN pin on the Button board, should be 0V.
  • Hold down one of the buttons and test the voltage at the BTN pin on the LCD/Button board. Left=0.54V, Up=1.78V, Right=2.72, Down=1.02.
  • No voltage change? Signs point back to the 1k resistor back on the Base board, or the soldering on one of the two pin headers' BTN pins.
  • Not all buttons show voltage change? Check the corresponding resistor which should read 5V on both ends with no button pressed. Left=8.2k, Up=1.8k, Right=1.2k, Down=3.9k
  • Voltage does change appropriately but doesn't do anything? Check the soldering on the BTN pin of the ATmega on the Base board.
  • Weird voltage all the time? Power down and check continuity between the BTN pin on the LCD/Button board header and other pins to look for a short (which could either be on the male or female side)
Click to expand...

got it had a bad pad little work and a mag glass got it fixed. on too raspberry pi 3 wont connect any longer red led but no green...
 
If the Red LED on the Pi comes on when you power it but the green LED never lights then it sounds like the Pi can't read the SD card to get the bootloader up and running. It should blink twice quickly (reading two startup files in the boot area) then pause, then a long green (about a second, loading the kernel), then start blinking fast (twice a second? in user mode preinit), then slower (once a second? in user startup) then stay steady on or off once it is fully booted. If you can see where it stops, that can tell you where the problem is but it might be easier to just re-image the SD card.
 
Bryan Mayland said:
If the Red LED on the Pi comes on when you power it but the green LED never lights then it sounds like the Pi can't read the SD card to get the bootloader up and running. It should blink twice quickly (reading two startup files in the boot area) then pause, then a long green (about a second, loading the kernel), then start blinking fast (twice a second? in user mode preinit), then slower (once a second? in user startup) then stay steady on or off once it is fully booted. If you can see where it stops, that can tell you where the problem is but it might be easier to just re-image the SD card.
Click to expand...

got it connected and fan works but no servo.............
 
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