Another genius workaround from Michael. The fact that the display is no longer available shows the high failure rate. Samsung gear is not what it used to be.
I bought a toaster oven . No electronics , just basic heating element and bi metallic thermostat . cheap and indestructible. Good old fashioned electrical engineering . it heats food and never fails
@@leetucker9938 that's similar to the microwave I got, bought 25 years ago. No microcontrollers, no displays, no inverters, just a simple clockwork timer, that goes ping with a bell. It could last another 25 possibly.
Well done Michael you are a clever chap who certainly don't give up easily, I really enjoy your videos and learn a lot. A while ago I spent some hours investigating a similar non start Samsung Microwave. Not having the circuit or knowledge of relay operations etc I tackled it by visual inspection, re-making various soldered joints, substituting a start switch and latterly substitution of a couple of relays. At some point it started to work again - but not reliably. On days when it failed I left it unplugged overnight and if it worked the next day I would carry on using it on a daily basis until it failed again. Eventually it fixed itself so I was left wondering what was the cause of the problem and expecting the problem to return. I believe in a previous video you mentioned it might be connected to leakage from the display. So when it was not in use I have been disabling the display by pressing the Eco button. I will check to see if the display has ghost L's but will dig out and fit the diodes.
I've found that moisture on PCBs in radios and kitchen scales can cause mayhem with buttons and rotary encoders. A good clean around with IPA works wonders.
Not sure quite how you figured out what the problem was, but nicely done. You could have bent each of the five retrofit diodes into a "Z" of sorts before fitting them, which would make access for soldering a little easier.
Nicely done Michael. What lead you to this (correct ) guess ? I know decades of experience (same as me in IT), but was there something in the past? To me this is almost like an early start to the Royal Institution Christmas Lectures :) So Happy Christmas too, just a bit early .
That was an L of a mod Michael 😂 (sorry, had to). Absolute wizard of an idea though. Still the master !!
Another genius workaround from Michael.
The fact that the display is no longer available shows the high failure rate.
Samsung gear is not what it used to be.
I bought a toaster oven . No electronics , just basic heating element and bi metallic thermostat . cheap and indestructible. Good old fashioned electrical engineering . it heats food and never fails
@@leetucker9938 that's similar to the microwave I got, bought 25 years ago. No microcontrollers, no displays, no inverters, just a simple clockwork timer, that goes ping with a bell. It could last another 25 possibly.
Your a master of fault find and solutions.well done
wow that was a great piece of diagnostic work, a shorting out display causing it to go into a lock mode ,the clues are there , thanks Michael😊
Isn't it a leaked display causing the MCU multiplex to fail to read the keypad buttons?
*leaky
Corporations must really love you repairing rather than landfill great job completed by carer
Well done Michael you are a clever chap who certainly don't give up easily, I really enjoy your videos and learn a lot.
A while ago I spent some hours investigating a similar non start Samsung Microwave. Not having the circuit or knowledge of relay operations etc I tackled it by visual inspection, re-making various soldered joints, substituting a start switch and latterly substitution of a couple of relays. At some point it started to work again - but not reliably. On days when it failed I left it unplugged overnight and if it worked the next day I would carry on using it on a daily basis until it failed again. Eventually it fixed itself so I was left wondering what was the cause of the problem and expecting the problem to return. I believe in a previous video you mentioned it might be connected to leakage from the display. So when it was not in use I have been disabling the display by pressing the Eco button. I will check to see if the display has ghost L's but will dig out and fit the diodes.
Well done Michael - good fix
Very good fix .Cheers from Australia.
Could be moisture ingress causing the leak? And if it's been standing for a year, any moisture would have evaporated probably.
Most likely you're right. The newer display probably has better sealant.
I've found that moisture on PCBs in radios and kitchen scales can cause mayhem with buttons and rotary encoders. A good clean around with IPA works wonders.
wow , awesome diagnosis
Not sure quite how you figured out what the problem was, but nicely done. You could have bent each of the five retrofit diodes into a "Z" of sorts before fitting them, which would make access for soldering a little easier.
He’s a genius that’s why. He’s also done another video on diagnosing clock signals on these.
👍👍👍
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Thanks sir❤❤
cool!
Nicely done Michael. What lead you to this (correct ) guess ? I know decades of experience (same as me in IT), but was there something in the past?
To me this is almost like an early start to the Royal Institution Christmas Lectures :) So Happy Christmas too, just a bit early .
funny how the warranty runs out the day before it breaks down,,Michael theyll be paying not to make these vids lol 👍