Well, that was a fun week I’ve just had! We are looking to have a video slide show in the church lobby for bulletins and the like, running from a Raspberry Pi Zero W miniature computer. To that end, I picked up a couple of broken TVs from Kijiji in the hopes I could get them to work.
Insignia 50″ TV… works well, except for when it doesn’t. Which is most of the time.
The purchase: 50 inch Insignia NS-50D40SNA14, for $40. (I also purchased a 60 inch Sony Bravia KDL-60EX720 from the same seller for an additional $50, but that’s a story for a different post.)
The problem: The Insignia shows a great image… for about 3-4 minutes. Then it goes completely dark. If it’s powered up immediately afterward, it will shut down within seconds.
Here’s the story of how I got this TV to work.
Given the symptom, it was clear that the TV was overheating someplace. The trick was to find out where and how to fix it. So, it was time to remove the back cover and look inside.
The back case came off pretty easily — I just had to remove a ton of screws.
The back cover was now off and I could take a look.
Hmm. It was pretty dirty. These components weren’t looking good. Could that have been the source of the overheating?
Alas, it was not to be that easy. I blew out the dust and tried the TV again, encountering the same problem. None of the capacitors looked like they were obviously failing, either (that’s often a culprit in electronics problems like this). I clearly needed to keep looking.
I also wondered if anyone else was having a similar problem and came across a handy discussion forum. One person found that their LED driver chip was overheating. This chip is labelled “OB3362RP” and a quick look at the data sheet revealed that it does indeed have thermal protection circuitry. That looked like a promising lead.
As a quick test, I taped a random heatsink I had lying around to the top of the chip to see if it helped matters at all. Even though this was not at all a good situation for the heatsink, I saw a huge improvement; the TV stayed on for about 16 minutes! A 400% improvement showed me that I was on the right track.
But why was the chip overheating in the first place? One suggestion I saw online was that dead LEDs in the backlight may be short circuiting, drawing more current than normal. That could do it. So I took the TV entirely apart. Dozens of screws and plastic clips later, I saw this:
Two LEDs were clearly out. Shortly after this photo was taken, a third one went out. Oops! So I removed one LED and tried soldering a random, 5V red LED in its place to see if it would light up. It did! I realized that I could conceivably replace the nonfunctioning LEDs. Off to the electronics supply store I went…
…and I picked up these generic white LEDs. I wasn’t sure if they would work, but they were a whopping 54 cents a piece so it was worthwhile to try it out.
The verdict: It worked. Briefly. They ran brightly for about 30 seconds and then began to burn out. I assume they couldn’t handle the current. Oops.
Chloe was getting bored by this point.
It was time to actually try to repair this thing with proper parts. I found some surface mount LEDs designed for TV backlights online and ordered those. The pack of 12 was a whole $10. (Plus $30 shipping. Whee.)
The bottom side of the LED strips is copper. I had seen someone online use a clothes iron to heat up the strip enough to desolder the old LED and to solder the new one. I tried it for a while (using a wrench to hold it down), but it wasn’t hot enough to melt the solder. Hmm. What else could I use?
Then I remembered: I have a George Foreman Grill! Not only can it make mean, lean, fat-reduced burgers, but removing the teflon pieces revealed a great hot plate. Would this work?
Short answer: Yup! It discoloured the paint on the strip somewhat but it worked wonders for soldering the surface mount LEDs!
I used tweezers to help position the LEDs just right on the pad.
Once I had all three of the burned-out LEDs changed, it was time to test it out.
And it… did nothing. Oops. Apparently I connected the LEDs backwards. It’s, uhh, a mistake anyone could make and stuff.
So… I removed them and turned them around. This resulted in more discolouration on the metal strips. Betcha can’t tell which three LEDs got changed, eh?
I used some double-sided tape to fix the strips to the back of the TV. Similar tape was used at the factory, as far as I could tell.
I also glued on the lenses with epoxy. Some of them had popped off when I removed the strips, in addition to the lenses for the three LEDs I had replaced.
And… Voila!! It worked!
However: it again shut off after about 12 minutes or so. Still, it was an improvement. I wonder if either the new LEDs are drawing more current than the originals, or if perhaps the LED driver chip was damaged somehow.
I decided to try out a heatsink again, since it looked like the chip was running close to the thermal threshold without one. I drilled a couple of holes so that I could mount an old heatsink from a CPU that I had lying around. I also put some thermal grease onto the top of the chip.
Huzzah! It worked wonders; the TV stayed on for as long as I wanted it to!
Since the heatsink was getting pretty warm to the touch, I decided to wire up its matching fan. Fortunately, the board has a 5.1 volt pin for when the TV is on standby and the fan (designed for 12 volts) shouldn’t draw too much current. So, I wired it up to that pin.
Huzzah! It worked! And best of all, the heatsink was now totally cool to the touch, even after hours of operation!
The heatsink and fan protruded too far to have the original back piece fit. So I needed to cut out a square piece with my Dremel.
And then I reassembled everything…
Here’s how the back looks with the fan sticking out. I’m going to have to find a grill of some sort to protect the fan and heatsink.
And here it is! Working! Yay!
For $40, plus $10 worth of LEDs (and $30 to ship them), I’m pleased with the fix. However there are several slightly brighter spots on the left side of the TV, and that’s not just where I changed the LEDs. I’m guessing I misaligned some of the lenses when I glued them back on. I’m debating taking the whole thing apart again to check it out… and I’m also thinking that it may be good enough. For the price, I really can’t complain. :)
Oh, and I also managed to get the 60″ Sony TV working. All four HDMI ports are dead but an HDMI-Component adapter works really well. I now have a huge TV in the rectory living room!
Has anyone else tried any repairs like this?
Hope I wasn’t too boring with the details… I enjoyed myself immensely as I was doing this fix!
I was delighted to have the recent opportunity to work with the wonderfully talented Kathleen (Kay Clarity) on several live music videos. She is a tremendous singer-songwriter in Saskatoon and it was wonderful to work with her and our mutual friend Liz. I was the tech guy, handling the audio/video setup (something I really enjoy doing! #geek) while Liz has a keen eye for photography and did a great job operating the camera.
Here is the first song we released last week: Forever. More videos are coming!
Some tech details:
Camera: Canon Rebel T2i with a 50mm Pentax prime lens from the 1970s. That lens is a pretty amazing piece of glass!
Lighting: Two Yongnuo YN-300 daylight (5500K) balanced lights as key and back lights, and a less bright Viltrox L116T, also at 5500K. All were battery powered and attached to microphone stands with 1/4″ – 5/8″ adapters. These were set up in a traditional, three-point arrangement.
Microphones: Shure SM7B for vocals and the always-trustworthy Shure SM57 for the guitar.
Recording: Fivefish Audio SC1mk2 preamp fed into an older Presonus Firepod, going into a 2012 MacBook Pro.
Software: Logic Pro X for audio and Final Cut Pro X for video. Video compression was done with Apple Compressor. (And yeah, my 5+ year old computer sounded like it wanted to cry when it was editing and rendering the video. Heh. It may be on its last legs…)
One issue that I have yet to fully crack is YouTube’s video compression. Depending on your viewing device you may notice some colour banding in the grey background near the beginning of the video. That is due to YouTube’s own lossy compression of what was initially a pretty high quality upload (ProRes). Apparently YouTube will sometimes recompress video into the newer/better VP9 codec rather than the default h.264 but I haven’t figured out how to make that happen. I do take heart in that I’m not nearly the only person dealing with this problem: I was watching the finale of the AMAZING fan series Star Trek Continues (seriously, if you’re at all into the original Star Trek, check it out!!) and even with their high-end production the YouTube feed suffers the same problem with background colour gradients. So I’m not alone in this, at least. :) I did insert some extra noise into the signal to limit the problem and it helped, but if you have any further suggestions for how to make YouTube (and Facebook) compress video more nicely I’m very open to hearing them!
Regardless, I am very pleased with how it turned out (11000+ views and counting on YouTube and Facebook). Most of all, it was a true gift to be able to work with Kathleen and Liz. Thank you both!
One of my longtime hobbies has been to record/play music. (See the “Music” button above for some stuff that we did about 7-8 years ago.) Unfortunately, I haven’t had much of a chance to do any recording lately but I think it’s time I got back into it.
I’ve especially been interested in some of the nifty features found in the latest versions of Apple’s Logic Pro X. With its MIDI abilities I’m able to connect my old keyboard and make it create just about any instrument sound you can think of. To aid with this, I picked up some new, professional instrument sounds from EastWest Sounds Online. Here’s a quick video of the pipe organ sound from their Symphonic Orchestra Silver package.
I hope to try out other instrument sounds soon. The package basically comes with a full orchestra worth of samples and they sound amazing. I’m excited to do more with them!
(And yeah, my keyboard stand bounces around a lot… 😜)
In March, 2017, I was blessed to join Lino Rulli and a group of 40 listeners on a Catholic Guy pilgrimage to Rome. During this time, we celebrated Masses in various churches.
Audio from my homily for each day has been published as a separate post on this website for those who subscribe to the podcast feed. I’ve also collected them all here on one page. Simply click the play button to hear each homily:
Today we celebrated a special Mass in honour of the 50th anniversary of Holy Spirit Parish! It was presided by Bishop Donald Bolen and afterward there was a reception in the parish hall. It was a fantastic afternoon!
One of the very awesome things is that a song was written in honour of the day: “Holy Spirit” by Sally Meadows and Stan Garchinski. Listen here:
I do not say this lightly: An experience happened during my recent pilgrimage to the Holy Land which I place as among the top experiences so far during my time as a priest.
By way of context, I was blessed and tremendously grateful to have been asked to be the chaplain of a large pilgrimage to the Holy Land with SiriusXM’s own Lino Rulli and Gus Lloyd. Over 90 pilgrims joined us as we toured the land of Emmanuel, where Jesus walked and continues to walk. We spent time at Caesaria Maritima, the Sea of Galilee (including a boat ride on the Sea), Nazareth, Capernaum, Mount Tabor, Bethlehem, the Mount of Olives, the Upper Room, and other places. In each place the Bible came alive in new ways.
However one aspect of the pilgrimage struck me repeatedly. As I was blessed to be able to celebrate the Mass in different locations, I could not help but notice one important feature about the liturgical books for each site. Typically a votive Mass was offered in these places that called to mind the Scripture story that took place there.
Site of the Annunciation. The Word became flesh, HERE.
In these places, the prayers and Scriptures were modified such that they emphasized the location. For example, at the place of The Annunciation, the texts referred to the Word becoming flesh, HERE. The Transfiguration on Mount Tabor referred to the glory of the Lord being made visible on THIS mountain. The Last Supper was celebrated HERE in the Upper Room. Every time one of these words would arise in the liturgy, they were presented in bold and all capitals so that we would not forget where we were and what had happened there. That led to a few emotional moments during the Masses as it hit me what had happened and Who had been present at that place.
But then, as I mentioned at the top, came one of the most moving events in my time as a priest.
The tomb was emptied. HERE.
I celebrated Mass at the site of the Holy Sepulcher, at The. Tomb. It was HERE that sin was defeated. All of history was changed forever, HERE. It was HERE that death lost and eternal life won. It was HERE that hope was poured out and love triumphed.
It is HERE that Jesus rose from the dead.
I don’t know how I held it together as I presided at that Mass. I could only imagine that it was a good amount of grace. It will take me a while to process what happened to me in that place, as HERE I reverenced the stone of the tomb at the beginning and the end of Mass, and Jesus became present once again in the Eucharist in the place where he rose in triumph.
All I know is that something changed in me. Somehow the Resurrection (which I believe and hold onto to the core of my being) became more real to me. Hope became more firm. Because of the Love that triumphed HERE, in that Tomb, I have, as the liturgy for funerals says, “a sure and certain hope” that my ultimate resting place is not in a tomb but in the Father’s house. And if I stay close to Jesus, who was and is victorious HERE, then his victory is also mine. It’s ours.
Again, this is not anything that I didn’t know before. And the same Jesus is every bit as present in my own land as he is in Jerusalem. But there was something about the tangible reality of that now empty piece of stone that affected me deeply. Perhaps St. Paul says it the best:
Death has been swallowed up in victory,
Where, O death, is your victory?
Where, O death, is your sting?
Thanks be to God, who gives us the victory through our Lord Jesus Christ.
(1 Cor. 15.54b,55,57)
HERE is the place of victory. Not just in a cold stone 10,000 km away, but HERE, offered to you and me.