LG Ultrafine 5k (27MD5KA) Screen Issues - Bad PSU?
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7 Year old monitor started to have panel issues today, no initiating event. Did the normal trouble shooting, shut every component down, disconnected, swapped cables, updated firmware, changed resolutions, etc... issue persisted.
:::spoiler Took it apart to have a looksie


Getting all the plastic snaps off the back of the monitor was the single longest part of this... very annoying. I miss easy to repair devices.
::::::spoiler The PSU has shorts!!

::::::spoiler the other side of the pcb is a transformer

::::::spoiler some other leaking seen as well

::::::spoiler both sides of the PSU in full


::::::spoiler the logic board looks fine


:::I'm tempted to just fix the shorted pads and test the voltages... I probably should replace the transformer
Lots of chatter on youtube about the thunderbolt ports dying on this monitor, but I don't think that is applicable to me. At least the PSU shouldn't look like this even if its not the core problem.
Any insights or suggestions from those you have rescued erstwhile monitors? This is the first monitor that has ever fully died on me. I melted a laptop screen sitting too close to a fire.. heh, but it was still usable.

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7 Year old monitor started to have panel issues today, no initiating event. Did the normal trouble shooting, shut every component down, disconnected, swapped cables, updated firmware, changed resolutions, etc... issue persisted.
:::spoiler Took it apart to have a looksie


Getting all the plastic snaps off the back of the monitor was the single longest part of this... very annoying. I miss easy to repair devices.
::::::spoiler The PSU has shorts!!

::::::spoiler the other side of the pcb is a transformer

::::::spoiler some other leaking seen as well

::::::spoiler both sides of the PSU in full


::::::spoiler the logic board looks fine


:::I'm tempted to just fix the shorted pads and test the voltages... I probably should replace the transformer
Lots of chatter on youtube about the thunderbolt ports dying on this monitor, but I don't think that is applicable to me. At least the PSU shouldn't look like this even if its not the core problem.
Any insights or suggestions from those you have rescued erstwhile monitors? This is the first monitor that has ever fully died on me. I melted a laptop screen sitting too close to a fire.. heh, but it was still usable.

I do have a video of the monitor freaking out, but I can't access catbox.moe and I don't know where else to upload
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7 Year old monitor started to have panel issues today, no initiating event. Did the normal trouble shooting, shut every component down, disconnected, swapped cables, updated firmware, changed resolutions, etc... issue persisted.
:::spoiler Took it apart to have a looksie


Getting all the plastic snaps off the back of the monitor was the single longest part of this... very annoying. I miss easy to repair devices.
::::::spoiler The PSU has shorts!!

::::::spoiler the other side of the pcb is a transformer

::::::spoiler some other leaking seen as well

::::::spoiler both sides of the PSU in full


::::::spoiler the logic board looks fine


:::I'm tempted to just fix the shorted pads and test the voltages... I probably should replace the transformer
Lots of chatter on youtube about the thunderbolt ports dying on this monitor, but I don't think that is applicable to me. At least the PSU shouldn't look like this even if its not the core problem.
Any insights or suggestions from those you have rescued erstwhile monitors? This is the first monitor that has ever fully died on me. I melted a laptop screen sitting too close to a fire.. heh, but it was still usable.

I found a used parts PSU board on aliexpress for $40 USD that claims to be tested and working, might as well grab that.
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7 Year old monitor started to have panel issues today, no initiating event. Did the normal trouble shooting, shut every component down, disconnected, swapped cables, updated firmware, changed resolutions, etc... issue persisted.
:::spoiler Took it apart to have a looksie


Getting all the plastic snaps off the back of the monitor was the single longest part of this... very annoying. I miss easy to repair devices.
::::::spoiler The PSU has shorts!!

::::::spoiler the other side of the pcb is a transformer

::::::spoiler some other leaking seen as well

::::::spoiler both sides of the PSU in full


::::::spoiler the logic board looks fine


:::I'm tempted to just fix the shorted pads and test the voltages... I probably should replace the transformer
Lots of chatter on youtube about the thunderbolt ports dying on this monitor, but I don't think that is applicable to me. At least the PSU shouldn't look like this even if its not the core problem.
Any insights or suggestions from those you have rescued erstwhile monitors? This is the first monitor that has ever fully died on me. I melted a laptop screen sitting too close to a fire.. heh, but it was still usable.

I can't tell you what's wrong, but these shorted pads aren't it. They are added to the traces for extra thermal mass, a bit more or less solder doesn't hurt. If you look closely, all of the shorted pads are on the same trace of the PCB, so they would be connected anyways.
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I can't tell you what's wrong, but these shorted pads aren't it. They are added to the traces for extra thermal mass, a bit more or less solder doesn't hurt. If you look closely, all of the shorted pads are on the same trace of the PCB, so they would be connected anyways.
Could it indicate something overheated on the other side of the board (the transformer)?