FlightAware Discussions

Need Assistance Pi & Monitor problem

Hi All,
I’ve been running PiAware on a Pi 3 since January, 2019 on a VGA monitor via a passive HDMI-VGA adapter.
All that runs on it is the ASDB sw, sharing with FA, FR24 & PF.

We had a close lightning strike early this morning.
All my PC’s, networking gear & ADSB eq. are on a surge protected battery back-up. I did lose a very old Linksys VoIP phone ATA.

Based on PiAware Skyview from a different PC, the Pi is running, but the monitor says “No Display”.
I plugged that monitor into a PC with teh HDMI-VGA adapter, display is OK…
I plugged the PC’s monitor (HDMI) into the Pi, display is OK.
I tried changing the config file based on a web search, no help.
I’m out of ideas.

Any advice?

Most likely the power supply took a hit.

With insufficient power the VGA won’t work, it draws more power compared to HDMI.

Recommended power supply: https://www.amazon.com/Official-Raspberry-Foundation-Power-Supply/dp/B01LCNF8FU

But of course it might also be damaged circuitry that is relevant only for the VGA output.

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I had a spare OEM 2.5 amp supply, it didn’t work either.

i had the same issue several months ago…monitor was fine, the RPI 3 just stopped driving the monitor…replaced the RPI 3 and all was well…

What has me scratching my head is how the RPi worked OK with a different monitor and it’s monitor worked OK on a PC.
Did you try a different monitor with the RPi?

same for me, my pc monitor worked on the RPI and the monitor i used on the RPI worked on my pc…i scratched my head quite a bit and then gave up

Same scenario all around. The RPi seller is giving me the round around regarding a replacement, have see where that takes me.
Thanks for the info. & your time.

Well, how is his fault that the lightning hit close by?

Personally I think that the Pi’s analog output is fried. It is a separate DAC chip. That’s why a digital connected monitor still works.

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“Well, how is his fault that the lightning hit close by?”
If I’m reading that correctly - how is it his fault … It’s NOT, however
I’ve been trying to keep my comments short and not drag a lot of previous details into this convo.

There’s been a problem with the RPi DC power Inout since I got it.
The Power LED would flash randomly. I simply put a pad of paper under the micro USB connector and 85% of the time, that solved the issue. Since it was sharing data, I didn’t want to take it apart.
During this latest issue, I found the DC power problem is caused by the case (supplied by the seller) not allowing the connector good contact with the RPi board.
I’m not sure I understand your comment, I’m using the same HDMI output for the different monitors.
If you’re saying the HDMI output switches between Analog and Digital automatically, then I learned something.

Doesn’t have to be the case that’s the problem.
Could well be that the power supply is just insufficient.
Best to use the RPi official power supply, it compensates for the input protection voltage loss by always delivering 5.1 V and probably compensating cable losses at higher current with extra voltage.

Anyway yes the connector is the same, the angalog and digital output is still produced in different chips.

The LED flashing has been happening since 01/31/19, the day I got the complete RPi kit with the case & official ps.
When I started troubleshooting the monitor issue, I took the board out of the plastic case.
I plugged the micro USB connector in and the LED hadn’t flashed since.
Yesterday I looked closely at the case comparing it to the width dimension of the Micro USB connector.
The micro USB connector was wider then the case’s opening. I cut about .08" off the case, put everything back together and the LED is solid.
While the case only kept the connector .062" away from a complete “plug-in”, it was clearly enough to cause the intermittent dc connection.

Opps got a call and forgot to finish.
Based on the comments here, it looks like I’ll run to Microcenter and just grab another RPi and see what happens.
Thanks Gents