Sir pharaon . . . . . . . .
OK here I am looking at this unit and starting a side by side working PCB side to FOIL side drawing comparison and you come up with your last info.
I then add it to the bottom and identify your circled units, which you claim as working . . . . but being uncertain of your manner of that confirmation.
If you are correct, there should be 19VDC across your LV storage capacitors at the left of the page, THEN that voltage gets routed on over to the output wiring.
If that voltage is NOT at the output connector, then see if repeated use and flexure . . . over time . . . has not broken all the wires inside the insulation on either wires internal conductors..
When you get down to 3 or so strands trying to carry 19VDC at ~ 5 amps the wires can vaporize then arc at every flexed closure and arc and vaporize open an even WIDER wire gap.
Or if that voltage is NOT at the final LV storage caps, your earlier stage circuitry is not working.
Tell us the part numbering of the 16 pin flat pack SMPS controller that this unit is using.
Also, might as well give the two LVPS sections two 8 pin IC’s numbers also . . . . and if exploration evolves to it . . . might need to take a pointed wooden sucker stick and abrade off the LARGE blob of white “pookey” that is covering a large area of the foil pattern. (Little nearby clear blob says . . . .me too . . .ME TOO ! )
You say:
The output caps is 680 mf and my voltmeter support 200 mf measurement only
Associated . . . Timely TechnicalTip . . . .on instrumentation:
.
HOW to take a Mickey Mouse limited range cap tester and extend its highest capacity range coverage.
Insert a 10 ohm resistor . . .no power level is involved . . . in series with your + meter lead and track down SEVERAL electrolytics in the 220-470-680-1000-2200-3300-4700 ufd values in different equipment and measure and take note of the reading produced by each one..
Make yourself a correction chart, to compare the meters capacitance readout to the ACTUAL value of capacitor being tested.
Now, when you encounter a capacitor greater than 200 ufd, you can use the series resistor to take a capacitance reading and compare to the correction chart to estimate the value of the > 200 ufd cap., I
think that I remember that this will work on up t0 4700 ufd or so, but on above that capacitance may be
totally stretching it a bit.
PHOTO MARKUPS:
http://i.imgur.com/Yh0kJzO.jpg
73’s De Edd