Question about Proview XL370B (Black) 17 in. Flat Panel LCD Monitor

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Preview 700 P

My proview TFT 700P goes to stand by but the indicator remains green.
I tried changing one power capacitor but the problem still remains can u help me. My mail ID is narwal_sunil@yahoo.co.in

sunil

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You should change al lthe caps in the PSU.. you can get them all from Maplins for a few pounds.
best get 105 centigrade ones

Posted on Nov 21, 2008

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http://en.wikipedia.org/wiki/Capacitor_plague
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Usually when the power light flashes and the screen remains blank and unlit, your power board is in fact malfunctioning. This is not always the case, as the problem can sometimes reside in the input or inverter boards. I would first recommend that you feel comfortable with opening up your screen and looking at components. It can be a little overwhelming at first. BEFORE PROCEEDING, UNPLUG POWER TO MONITOR. If inclined to check, carefully open the casing around your screen. I have not worked on your particular model, but some are easier to open than others.

Once opened, you need to gain access to the circuit boards. Sometimes they are not protected by metal, other times they are completely encompassed. The flashing power light usually indicates that a capacitor(s) is(are) malfunctioning. To see if this is the issue, locate the power board (usually the one with larger-size components) and look for any capacitors having bubbled or raised tops and/or oozing a brownish liquid. If not on the power board, look elsewhere for the same symptom.

PLEASE BE CAREFUL!!! If you have recently had your monitor plugged in, the larger capacitors can still carry a charge. If you cross the leads of a capacitor while it carries a charge, it will discharge. It won't hurt any other components, but if you cross the leads with something that is in direct contact with yourself, you can get quite a jolt! There is usually a large voltage capacitor (normally just one) on the power board of these screens. I tested one with a multimeter after immediately unplugging it, and it still held a 166V charge! So please, do this with caution.

If a bad capacitor has been found, simply remove the old one and solder a new one in its place!

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