filter board is fully assembled, and i’m about to attach the lcd screen on the control board, which is when i tested the boards together. as far as i could tell, the shruthi did not ‘turn on’–no led’s lit up. thinking it might’ve been the power supply i purchased (9v), i used the voltmeter to test it, and got a reading of 13.5V. (elsewhere on the forum, users have stated the only effect of using a higher-voltage power supply is heated voltage regulators.) lastly, when testing the filter board’s voltage (at the points recommended at step 5, “power supply testing”), i got readings of -0.6v at the red points and -3.6v at the green points. lastly, on the control board, i followed the pictures not the instructions, and soldered the ICs directly to the board, without the sockets.
i’ve triple-checked the boards…the solder looks fine. why won’t it turn on? and why am i getting strange readings, that are both negative?