So, first of all thank you guys for this great project and for the great forum!
I just finished my first HM 4.2 but it's not going as planed. At initial start up it failed, screen flickering and no LED lights at all. Found that I was getting 14 VDC (normal) and 3 to 4 VDC at IC1 (expecting 5). At this point I switched to PI power and started probing and screen came on (black rectangles) but no LED. HM is reachable online but has AVR error. I tried # avrudate in console and manual update from web and both return "AVR fuse ERROR".
Reheated all the joints and still same result. After some probing around with my limited knowledge I am having hard time finding 3.3 V anywhere except PI connector, but @ IC3 no 3.3 V so I suspect that is not alloying me to program the ATmega328.
Can you guys steer me in the right direction to find my problem with missing 3.3 VDC or if any other things that I missed?
Thank you!
front pic: https://drive.google.com/file/d/0Bxl_1zG_8FJ7VlF2VkJwQ29Hclk/view?usp=sharing
back: https://drive.google.com/file/d/0Bxl_1zG_8FJ7QWlQZk1SbGhrWm8/view?usp=sharing
console: https://drive.google.com/file/d/0Bxl_1zG_8FJ7Z3dyWFJ0eFg1MFk/view?usp=sharing
I just finished my first HM 4.2 but it's not going as planed. At initial start up it failed, screen flickering and no LED lights at all. Found that I was getting 14 VDC (normal) and 3 to 4 VDC at IC1 (expecting 5). At this point I switched to PI power and started probing and screen came on (black rectangles) but no LED. HM is reachable online but has AVR error. I tried # avrudate in console and manual update from web and both return "AVR fuse ERROR".
Reheated all the joints and still same result. After some probing around with my limited knowledge I am having hard time finding 3.3 V anywhere except PI connector, but @ IC3 no 3.3 V so I suspect that is not alloying me to program the ATmega328.
Can you guys steer me in the right direction to find my problem with missing 3.3 VDC or if any other things that I missed?
Thank you!
front pic: https://drive.google.com/file/d/0Bxl_1zG_8FJ7VlF2VkJwQ29Hclk/view?usp=sharing
back: https://drive.google.com/file/d/0Bxl_1zG_8FJ7QWlQZk1SbGhrWm8/view?usp=sharing
console: https://drive.google.com/file/d/0Bxl_1zG_8FJ7Z3dyWFJ0eFg1MFk/view?usp=sharing
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