ViewSonic N3235w - No Power

[StodgyWaif]

Hello Everyone.

Thanks to badcaps.net I've been able to repair a couple of monitors by replacing caps.

I picked this one out of the garbage pile at my work thinking I would find more of the same.

To my surprise, all of the caps look okay. Also, none of them look like CapXon brand.

There is an orange LED lit when you plug in the AC. The power button does nothing. No change in the LCD or the orange LED.

PSU Model # FSP212-3F02


I've looked at the Basic_LCD_TV_trouble_shooting_guide_by_Bud Martin PDF but honestly I don't know where to begin.

It has 5v right? Because the orange LED being lit?

I can take more detailed photos if needed.

Any advice or information is appreciated.

[nomoresonys]

Re: ViewSonic N3235w - No Power

maybe check power supply connectors for expected voltages, might be a label with expected voltages by the connectors, check in dc mode, black probe to chassis red probe top of connector, as always be careful working with power supply, HIGH VOLTAGE, on primary side can be deadly.

[budm]

Re: ViewSonic N3235w - No Power

You need to locate PSON signal pin to see if it shows >2.5VDC, if it present, then you need to check and see if the DC Voltage right at the two legs of the main filter cap (big black cap laying on its side) is >360VDC.
Be careful not to let the probes slip on you, and do not touch anything on the board with you hands.