Question about Mag Innovision 19" LCD Flat-Panel Monitor LT916S
My flat screen was going in and out for awhile, now it is completely black, but the blue power light is on. From what I have read it sound like a capacitor on the invertor board may be the culprit, but there are several. Whats the best way to test them and can it be done with an ohmmeter?
You can test capacitors with an ohmmeter. A good capacitor behaves like a short circuit when you first apply a voltage, then its resistance increases as it charges. The capacitors that fail are electrolytic types with polarity, so be sure to put the meter ground lead on the capacitor negative. The cap will be marked. An open capacitor will show no kick in the reading, and a shorted cap will show a constant low resistance.
Now, having said all that, ohming a capacitor isn't 100% effective as a test. A capacitor's value may change to the point where a circuit will stop working, but if the cap isn't shorted or completely open, or is just a very low value, the ohmmeter test won't show a problem. A capacitance tester is better. Many digital meters include a capacitance test function.
Most inverter circuits have only a small number of capacitors, and it's usually faster just to change them all. If you replace a capacitor, keep the capacitance the same (the microfarad value) but use a little higher voltage rating. Caps come in standard voltage values, and they get physically larger as the rating increases, but if you just go up one level the new part will usually fit. The main reason these go bad is that the manufacturer used too low a voltage to begin with. It keeps costs down, but the parts are stressed and often can't deal with it.
Posted on Dec 06, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jun 12, 2014 | HP Computers & Internet
Dec 04, 2009 | Samsung SyncMaster 932B LCD Monitor
Nov 05, 2009 | LG Flatron L1515S 15" LCD Monitor
Sep 25, 2009 | HP Pavilion F1903 19" Flat Panel LCD...
Jun 16, 2009 | Dell E173FPc 17" TFT LCD Flat Panel...
Feb 26, 2009 | Liquid Video L17LCD2 17" Flat Panel LCD...
Jan 16, 2009 | Sampo PD-70 15" Flat Panel LCD Monitor
Aug 05, 2008 | HP f1905 19" Flat Panel LCD Monitor
Aug 18, 2014 | Mag Innovision 19" LCD Flat-Panel Monitor...
Oct 25, 2010 | Mag Innovision 19" LCD Flat-Panel Monitor...
279 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: