I have a problem with the power supply on my Primer2.
After receiving it I charged the battery as per the instructions, and pressed the push button to start, and all I saw was the screen flash white, and then nothing. Eventually I pulled out the battery jumper and got it to work ok. After playing the maze game for a while I put it away for a few weeks until I had some spare time.
Now I can't get it to work at all.
My battery voltage with the jumper open is 4.1 V. When I replace the jumper the voltage is approx 3.5V. As soon as I press the push button to start, the battery voltage (Vbat) drops to 1.5V!! Net VCCIN is the same voltage as Vbat (as expected) and I have nothing out of the voltage regulator U9.
I am wondering if U9 is dead and bringing down the battery power line. In the known issues section a problem is described with U9 failing due to over voltages and a repair required to the ground track. My board has had the mod done in the factory, but I am wondering what are the symptoms to confirm that U9 has died.
Has anyone encountered anything similar?
