e-licktronic Forum

Hello,

I've just finished my NAVA build. I've turned the power ON : No led light on, LCD screen black out.
The power on J5 on the main board seems OK.
IC power measurements were ok during the build.

Could anyone give me hints on where to start debugging ?

NOTE :
- The internal led of the LCD is On when power is on
- power measure on every instruments :
-> square pads : 5V OK
-> ICs (M5218): square pads : 15V, circle pads : -15V : OK
-> leds on the sequencer part are soldered in the right way
Many thanks!

OK, it seems that Gnd from the IO board is not in continuity with some ground points on the sequencer part...digital ground is not grounded...
I had to put a jumper on R40 to make it worked.
No hint about this in the build guide...
now the sequencer and display are running OK.

sequentialmood wrote:OK, it seems that Gnd from the IO board is not in continuity with some ground points on the sequencer part...digital ground is not grounded...
I had to put a jumper on R40 to make it worked.
No hint about this in the build guide...
now the sequencer and display are running OK.

Where is this I can't see it?

bump, I'm having a similar issue with a v1.01 board, please could you help me figure out where this jump point is? Thanks

Jumper refers only to v1.2

serum114 wrote:Jumper refers only to v1.2

OK, but I am having an identical issue (blacked out LCD on startup) with my build. Does anybody know what the issue might be?