Here is a picture of my meter assembled, I have bought the same one as vinceroger.
It was impossible for me yesterday night to see the color bands so I measured the resistors and put them in according to
stj's nice reverse engineered component schematic.
That said it's of course possible some of the resistors are 0.1% while some could be 1%, so no warranties there
I now tested another firmware:
mega328_st7565 but the screen was blank with that as well.
Do note that our LCD has 9 pins, I note that most other testers use LCD's with a parallel connection and much more pins?
The meter stays on for ca 4 seconds with these firmwares, but stj posted
another few on the thread at badcaps.net and with that I got some scrolling text on the screen. (Picture attached).
The behavior with all tested firmwares seems the same though: one press and red LED comes on, backlight comes on then meter turns off after 4 seconds.
With a 5 second long press meter stays on forever and I need to pull the battery to get it to turn off.
I theorize the problem is the same with all firmwares, it's just that the problem is visible with some firmwares :/
As vinceroger mentioned though he bought both the "DIY" meter like me and one preassembled and both his meters work fine with the pre-programmed chip from the seller!