Re: My Viewsonic VX924 monitor died!
I've attached a marked-up version of the picture you supplied.
Here's some things to check in no particular order.
The IC circled in yellow is the SMPS controller. I believe retiredcaps asked for the part number.
I've labeled the +12 and Gnd pins at the output connector. Set the DMM on the 200 ohm range and measure the resistance between those points. If it more than 200 ohms it is highly unlikely the inverter drivers are shorted.
I've numbered the pins on the transistors I suspect. Again, with the DMM on the 200 ohm range, measure the resistance between pins 1 & 2, 1 & 3, and 2 & 3 of Q8. Repeat for the other 3 transistors. If all pins of a particular transistor show a low (<10 ohms) resistance, the transistor is shorted.
PlainBill
Originally posted by NeiltheDruid
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Here's some things to check in no particular order.
The IC circled in yellow is the SMPS controller. I believe retiredcaps asked for the part number.
I've labeled the +12 and Gnd pins at the output connector. Set the DMM on the 200 ohm range and measure the resistance between those points. If it more than 200 ohms it is highly unlikely the inverter drivers are shorted.
I've numbered the pins on the transistors I suspect. Again, with the DMM on the 200 ohm range, measure the resistance between pins 1 & 2, 1 & 3, and 2 & 3 of Q8. Repeat for the other 3 transistors. If all pins of a particular transistor show a low (<10 ohms) resistance, the transistor is shorted.
PlainBill
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