Sir jacob varle . . . . . . . .
Ahhhhhhhhh so . . . . . . this do be velly- velly intelesting . . . .
Rather than a further observational manner, instead lets move more of an analysis of what we currently have.
Figure on our DC power coming in from the shown VERY nearby power connector and then initially passing thru the parallel connected 2W power resistors / or / inductors and then the outgoing power flows over to the 2200 uf cap.
You then have a basic filtered power source, ready to distrubute around the board or with part of it to possibly be regulated down to sub voltage(s).
That is, until it then flows down its branches and then encounters that top right tantalum cap which breaks down and rapidlly plummets down to an almost zero ohm short across that supply.
The 2.7 resistors / 2.7 inductors then heat up as they were not designed for carring that level of power thru them.
Ole 2200 cap over there is watching the mayhem . . . . but its no load on him . . . since its strictly being THEIR problem.
If its being shown on your plug in power pack . . . . . give us its voltage and current specs + wattage if being available.
It took some POWER to fry those components to their currently damaged states.
To analyze, now take metering in hand and set up for its lowest range ohms and short out the meter probes to see what your then testing of an ALMOST 0 ohm short will display on your metering. ( Take mental ref of reading)
(That unknown variable anomoly, is being the intermediate lead and contact resistances )
With an unpowered unit . . . . . one then reads across the RED ARROW fried tantalum top and bottom tabs for its present resistance value. Close to 0 ohms ?
Then measuring from its top tab over to the 2200 elect + terminal should be close to the same.
Now for the mystery tandem pair, you need your GOOD board to measure across them to get their paired resistance.
See if it is reading close to 0 ohms or is it on up as high as ~1.3 ohms ?
ALSO take a like reading on the same parts on the burnt board., is it same low ohms or an open circuit ?
Should it happen to read 20 or 200 ohms, would be suggesting of your having had a carbon composition pair.
Elsewhere on the board I can partially see a modern day metal film 2 watt what looks to be either a 0.22 or 2.2 ohm resistor.
Which Is what you would expect to be finding on this board
BUT for those two parts , their axial lead bonding and caseis looking akin to 2 antiquated 2W carbon composition resistors, and they are also BURNING in the same manner and positions that they do, when they fail.
BUT the case color coding bands aresomewhat akin to inductor marking protocol.
The way the photographs color reproduction is showing up for me is SILVER end band RED band GOLD band VIOLET band and SILVER, other end band.
One other factor unavailable is their odor . . .the carbon compositions emit their distinct phenol odor on overheating . . . .akin to what you might relate to the odor of LYSOL, a readily available cleaning and disinfectant product.. A nearby nose sniff should still detect that odor.
I also have never seen as low of an inductance of 2.7uh heat up that much, unless you come up in the above reuested info, one hefty current level being available.
Wierd that there was no inline fuse nearby also.
Unless these units were carbon composition resistors being used as sacrificial fusible resistors.
BTW what is this mystery units brand and model number ?
Waiting to see which way the resistance suggests on the reading of the parallel pair on the GOOD board.
73s de Edd