Some questions about the PCB damage in my monitor

[insincere_dave]

Bit of an electronics newbie with a few questions:

My monitor briefly started emitting a burning smoky smell which then changed to a sweet burnt smell (kinda like TCP antiseptic for any Brits here). The monitor still ostensibly works fine other than the smell.

I opened it up to take a look and snapped some shots (the board is a pwi2304pc) . The only damage I can see is to the PCB around the inverter. The inverter itself looks fairly healthy. The discoloured parts of the board are where the board has bulged quite significantly (not sure what the technical term is for that). The capacitors all looked normal.

Like I say, the monitor still works but when I switch I get the strong odour of what I am guessing is charred PCB!

I guess I'm curious how the PCB has taken the brunt of the damage and that the damage reaches pretty far from the inverter, but the inverter itself doesn't have any real signs of damage. Is that normal for damage to spread that far across the PCB? Are the bulges (and their distance from the burn marks) in the PCB significant - could they indicate a different root cause?

I figured I could try replacing some components but is that wise given the current state of the PCB?

Thanks everybody (hopefully images are attached)

 

[73's de Edd]

Sir insincere_dave. . . . . . .

.Could that board be slightly arcing over and starting a heated trail and you then detected the outgassing smell of phenol (We Amerikanskis recognize that scent associated with LYSOL ) as further heat up proceeds?.
I can't see EXTREMELY well, ( on the GREEN masked area of the PCB ) but it looks like a carbonized area there .

You can see precaution action, in this board design having complete cut out slots at critical areas . . . . .at the GREEN arrows.

You have like paths from the other inverter transformers

Shut down and finger-tip feel the temperature of that heated area as immediately compared to a companion inverters side area .
Expecting that affected area to be warmer.
If so, an end fix might have to be: :

Use a Dremel tool with cut off wheel to cut out and remove the YELLOW area and clean board ,
It should require unsoldering at the RED dot areas and lifting out that inverter transformer for full access..

CCFL HV DRIVER SUPPLY CIRCUITRY:

BTW . . . . .By ALL means . . . . . What is the monitor brand and model number ?



73's de Edd