A friend of mine dripped off his Toshiba laptop with a black screen. I pulled the screen apart and found that the inverter was the problem the lamp tested ok. Question is; the inverter is such a small board is it repairable? or cheaper to buy new. Is there a common fault to look for?
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Re: Toshiba Satellite A200 Inverter
Just sorting by price on ebay.ca, I see multiple buy it now with free shipping for $5.01 CDN.
I'll bet you will get it from the same seller I got mine from even though they all have different seller names.
Mine came in a pink cardbox box with bubble wrap protecting the inverter.--- begin sig file ---
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Re: Toshiba Satellite A200 Inverter
Received the inverter today and installed it. The thing worked fine but now after awhile the screen will go black as before but if I change the resolution it will come back on, or if I restart it comes on ok for a while but than goes black again. When I connect to an external monitor it lights up on both. What is going on??? anyone.Comment
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Re: Toshiba Satellite A200 Inverter
I take it this was purchased from some vendor in China. And it's new? I figure for $5.99 plus free ship, there was probably very little or no quality control involved. You may have gotten a bad inverter. Sometimes a used OEM inverter is much better than some of the "new" stuff out there.
Have you tried turning down the brightness? Maybe it's getting saturated and shutting down.Comment
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Re: Toshiba Satellite A200 Inverter
I agree that you might have gotten a bad inverter. You may want to send the ebay seller an email and ask about warranty/refund or non working items (or pull up the old auction and review the terms).
I have had one or two non working items from far east sellers and they have always refunded me without any hassle.
However, before, assuming that the inverter is bad, maybe something else wrong with the laptop? Did your friend drop the laptop at any point?
When you pulled the screen apart, is it possible that one of the connectors or wiring is not fully connected?--- begin sig file ---
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Re: Toshiba Satellite A200 Inverter
Thanks jetadm123 Ya when ever I make any adjustments to the display it comes back on, which I find odd? I though if the inverter was dead it would not light up at all? Could it be a software problem? although I changed the video driver.Comment
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Re: Toshiba Satellite A200 Inverter
Most have a 7 day warranty, but some require that you ship the item back. Since shipping FROM Canada to anywhere is ridiculously high, I would just eat the cost and keep the part. However, I always contact the seller first, explain the situation, and let them have an opportunity to make it right.
If it does turn out to be a bad inverter, I honestly would take another chance and order yet another inverter off ebay (done it before). If you get the exact same problem, I would think the odds of getting 2 bad inverters would be low and that would point to something else wrong.--- begin sig file ---
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Re: Toshiba Satellite A200 Inverter
Check out this thread. Sounds like similar symptoms?
https://www.badcaps.net/forum/showthread.php?t=12329--- begin sig file ---
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Re: Toshiba Satellite A200 Inverter
Ask your friend if he/she ever noticed any pinkish/redish hue before the screen died? As ccfl's age, they draw more power.
You could have a bad wiring, ageing ccfls, etc. See
http://s807.photobucket.com/albums/y...klight%20lamp/
for examples.
edit: re faulty inverter. If you put the original inverter back and lower the brightness, do the lamp stay off or on?--- begin sig file ---
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Re: Toshiba Satellite A200 Inverter
My friend indicates that there was no unusual sympations at all his wife was using it and it just went black. The laptop is only three years old seems to be early for bad lamps. I reinstalled the old inverter and the lamps will not light at all.Comment
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Re: Toshiba Satellite A200 Inverter
I read somewhere that some "cheap" lamps will only last 10,000 hours? So depending on usage, abuse, brightness settings, and quality of the OEM lamps, it is possible that 3 years of usage that the lamps are dying.
If there were my laptop, I would try another $5 ebay inverter as I stated before.--- begin sig file ---
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Re: Toshiba Satellite A200 Inverter
This might be marketing BS to sell more lamps, but (the "strain" might also explain why the original inverter died and why the replacement needs the brightness decreased?)
http://ccflwarehouse.com/faqs.html
Q: What is the typical life of a CCFL lamp?
A: The typical rated life of a CCFL backlight is 20,000 to 40,000 hours, however when used in LCD applications such as laptops you should expect between 1.5 and 3 years of use from most manufacturers.
Q: How do I figure out if I need to replace my backlight?
A: As CCFL lamps age they require more and more voltage to stay lit. This puts a tremendous strain on the inverter that powers the lamp.Last edited by retiredcaps; 12-01-2010, 09:29 PM.--- begin sig file ---
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Re: Toshiba Satellite A200 Inverter
I have never noticed this before; This site lists the strike voltage, working voltage, and watts of the different length ccfls for laptops and LCD screens, I do not see anything listed for the diameter.
Maybe with the help of PlainBill we could find an acceptable length of a ccfl to use for testing.I honestly do not think my mind will allow me to do the math, I hurt so bad sometimes it's hard to think.
Thinking about it maybe a resistor could be temporally substituted, and then monitoring the ac voltage of the return wire to see if the inverter is commanding the back light to be on.
Al.
http://www.lcdparts.net/CCFLDetail3D...ProductID=2900Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!
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