Hello! I've obtained a broken 17" LCD Phillips 170S, and I'm trying to fix it.
It's first symptoms were that the backlights, simply wouldn't light up (the LCD still displays an image). Once taking it apart, I found 4 blown capacitors on the power inverter, which I replaced with ones of equal voltage and capacitance.
Having done so, no smoke (Hoo-ray!), and the backlights lit up, but only for a couple of seconds. (They will stay on for about 3 seconds every time I turn the power on.) However, the display on the screen is still shown, so I assume that's good news .
My next guess would be to find another 17" LCD of same proportions and switch out the backlights, but then I started thinking. Seeing as the backlights _DO_ light up, even for just that brief amount of time, it leads me to think that maybe something else in the power inverters circuitry went bad, and is only allowing for a short burst of electricity, which is needed to power the backlights.
I suppose my question at this point is, what should I look at? I'm nowhere near being able to call myself a circuitry expert, or in an intermediate position for that matter, I'm a programmer, but I'm a fan of salvaging parts from dead components .
They only component I know how to check(Other than the universal signs of a fire) are capacitors, and noticing their nice little blown top. What other components should I look at, and how can I distinguish if they're good or bad?
I thank you very much for your time and effort!
~Lysol
It's first symptoms were that the backlights, simply wouldn't light up (the LCD still displays an image). Once taking it apart, I found 4 blown capacitors on the power inverter, which I replaced with ones of equal voltage and capacitance.
Having done so, no smoke (Hoo-ray!), and the backlights lit up, but only for a couple of seconds. (They will stay on for about 3 seconds every time I turn the power on.) However, the display on the screen is still shown, so I assume that's good news .
My next guess would be to find another 17" LCD of same proportions and switch out the backlights, but then I started thinking. Seeing as the backlights _DO_ light up, even for just that brief amount of time, it leads me to think that maybe something else in the power inverters circuitry went bad, and is only allowing for a short burst of electricity, which is needed to power the backlights.
I suppose my question at this point is, what should I look at? I'm nowhere near being able to call myself a circuitry expert, or in an intermediate position for that matter, I'm a programmer, but I'm a fan of salvaging parts from dead components .
They only component I know how to check(Other than the universal signs of a fire) are capacitors, and noticing their nice little blown top. What other components should I look at, and how can I distinguish if they're good or bad?
I thank you very much for your time and effort!
~Lysol