I've been going over this monitor for about a week now and i'm stumped. When you press the power button on the monitor the green led lights up, goes out after a second then repeats. The monitor cannot be turned off unless i pull the power cord from the wall. You can hear a brief buzz from the main tranformer then the monitor goes into repeat mode. I am assuming its detecting a fault and is going into some type of protection mode.
The capacitors are rubycon YXG series. I pulled every cap and tested them with my Peak meter and all of them are within tolerance as per rubycons datasheet.
The Pwm controller is SG6841SZ. I checked pin 1 (ground) to all other pins and i am not getting a reading that indicates a short.
On the back side of the power supply there are 4 C5706 transistors that i put a red box around. 2 of them read in circuit shorted. I replaced the 2 and i am still getting the same results. I rechecked the 2 i just replaced after trying the monitor out and in circuit the new ones are reading shorted. I have not pulled them off the board to verify they are shorted yet.
The one thing i find very odd is on the back of the power supply there looks like a jumper wire was added from one a transistor to one pin of the inverter transformer. It almost appears that this was done from the factory, the soldering is very neat and clean.
I am hoping someone has encountered the same issue with this particular monitor. All the info i have found yet points to bloated bad caps which mine has are good
The capacitors are rubycon YXG series. I pulled every cap and tested them with my Peak meter and all of them are within tolerance as per rubycons datasheet.
The Pwm controller is SG6841SZ. I checked pin 1 (ground) to all other pins and i am not getting a reading that indicates a short.
On the back side of the power supply there are 4 C5706 transistors that i put a red box around. 2 of them read in circuit shorted. I replaced the 2 and i am still getting the same results. I rechecked the 2 i just replaced after trying the monitor out and in circuit the new ones are reading shorted. I have not pulled them off the board to verify they are shorted yet.
The one thing i find very odd is on the back of the power supply there looks like a jumper wire was added from one a transistor to one pin of the inverter transformer. It almost appears that this was done from the factory, the soldering is very neat and clean.
I am hoping someone has encountered the same issue with this particular monitor. All the info i have found yet points to bloated bad caps which mine has are good
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