Re: Dell U3011 no display after a few minutes

...and a big thanks from me. Summer in Australia and with the extra heat my U3011 started going blank on me.

@Darran thanks for the pictures and instructions and @Eugene13 for the directions to the rectangular cap .

I found dry joints on the rectangular cap on the power board as others have reported. In re-flowing the joint I noticed that the solder was not sticking to the legs of the cap very well so like @essejlc I desoldered each leg and cleaned the little stub with some desoldering braid moistened with...

Re: Viewsonic VP2030b

Yes - thanks lucky. Thanks to the other posts on the forum I did find other bulging caps.

Last night I replaced:

3 x 180uf 35V on the inverter board

3 x 330uf 16V on the main board
1 x 1000uf 6.3V on the main board

1 x 220uf 25V on the power board
1 x 470uf 16V on the power board
1 x diode on the power board (shorted)
1 x 2.4ohm resistor on the power board (burnt)

All these caps were obviously bulging

The monitor is now working but I am hesitant...

Re: Viewsonic VP2030b

I've now accumulated all my caps for this repair but the resistors I ordered are of a different type. Can someone confirm if these are going to be suitable?

The markings I can read on the original are "2.4[ohm symbol]" and "1WJ" - thanks Rtech for confirming above.

I ordered 2.4ohm 1W metal film resistors - but they are a lot smaller and I'm wondering if I should have bought a different type or larger wattage (though appreciate they might just be a different design)?

I took the "1WJ"...

Re: Viewsonic VP2030b

Thanks for that. I removed the resistor and diode from the PCB for testing.

The diode appears to be a straight circuit - tester drops from 1.4V to zero in both directions. Marking say P6KE8.2A 5023 so [URL="http://au.farnell.com/vishay-general-semiconductor/p6ke8-2a-e3-23/tvs-diode-600w-8-2v-do-204ac/dp/1531799"]Does this Farnell part look right?[/URL] (Farnell had both P6KE8.2A and P6KE8.2A-E3/23 - the same?)

The picture below from another thread shows this resistor is marked 2.4 ohm but I'm measuring 50 Kohms
...

Viewsonic VP2030b monitor.

It briefly went blink-blink-blink and then when turned off for the night would not turn on in the morning.

On pulling the boards I found two bad caps in the PSU almost instantly and new caps have been ordered from farnell.

220uf 25V left of the heatsink: 1x EKZE250ELL221MHB5D 25v 220uf KZE
470uf 16v on the right: United Chemi Con EKZE-160ELL471MH15

The two 1000 uf caps laying down on the right of the heatsink appear fine.

I see some pretty severe scorching of the PCB around the grey resistor...

Re: vp2130b cap help

Hi guys,

Hope you dont mind me joining this thread.

I have 3x vp2030b. One just briefly went blink-blink-blink and then when turned off for the night would not turn on in the morning.

On pulling the boards I found the bad caps almost instantly and came looking here for help and found a great surprise with the info in this and the other vp2030b thread. THANKYOU. New caps have been ordered from farnell.

However.... I have some pretty severe scorching in the PSU.

The two caps that are oriented...