Question about Acer AL1511 15" LCD Monitor

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Procurement of CCFLs and Inverters for LCDs

El Duderino in a post concerning LCD issues stated that the CCFLs and Inverters are "replaceable". Is there a supplier I may order these from or does he mean I must take it in to a repair facility to have them replaced?

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You can buy the CCFL from sizes). Bulbs are cheap but replacement is tricky on some models.. Inverters generally fail due to heat in the small coil wound or Piezo electric Transformer failing. If you can find the correct parts these are repairable as well.. Good luck!

Posted on Jan 13, 2008


Inverters and CCFL's can be purchased from

Posted on Oct 23, 2007


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1 Answer

VIZIO 42in LCD HDTV - Dark colors and flickering

It sounds that the back-light CCFL lamp is faulty. It is time to replace it. When replacing, do it to all CCFLs, because, the life time to these lams are expiring now, as the set is nearly 4 years old. Check this link to get more details about how to replace the CCFLs. Pull up older posts there. Some among it have details.

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Powers off after green light comes on

-ALL lcd tvs, except for latest units with LED backlighting ,use from
two to six or more CCFL lamps-any of which can fail-causing darker bands on sceen since failed CCFL CANNOT illuminate screen area
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more ccfls are failing-OR INVERTOR section failing-where INVERTOR board gets juice from power supply and ups voltage to >1500 v AC
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Stand by flashes 7 times and no picture

If your T.V. is LCD then you may have a burned out bulb, this is a very common problem with LCDs. The screen remains black because the high voltage inverters for the cold cathode florescent lights turn off if a bulb is bad to prevent a spark or arch of electricity causing a fire. You can find more answers or even replacements/servicing through your manufactures website as this is a common issue.

You can also check the inverter board and check for bulged capacitors to see if there is a bad one that needs replacement. if you find one you can easily replace it by ordering one offline or goign to an electronics supply store. be sure to match up voltages and uF numbers.

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1 Answer

My Gateway M-6307 has a backlighting issue. The computer works but the screen is really dim. External output works, but dim on the LCD. I have switched LCDs from another Gateway laptop...same results. I've...

Have u tried replacing or trying a different power supply? Sometimes when a power supply is going bad will not put out the right voltage for the internal switch to kick up the brighter setting. Therefore it still thinks its on battery mode. Test the voltage from the supply and compare it to the recommended voltage gateway suggest for that laptop.

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1 Answer

My screen isn't working when I turn the laptop on.

First you determine if you have a no post, or a no video situation. To see if it is no post:

If the system is in a no video state, connect an external monitor and enable it with Fn-F8, if you get video, replace the LCD. If an external monitor doesn't work, replace the video card

If system is a no post, you will like need a motherboard. LCDs or motherboards can also be found searching Ebay.

Teardown instructions can be found here:

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1 Answer

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Its back light in LCD Panel problem, there are approx 20 CCFLs in 40" lcd panel and one or two in upper half is not providing enough light to give proper brightness so you see bit darker image.
As per Sony policy, lcd panel will be replaced to fix this issue and local tech can fix it on component level (replacing bad ccfl) if he/she agrees because its risky work.
Hope this nfo will help you.

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2 Answers

I have a Sony KDL46XBR4 LCD that has a problem with the backlight. It is dark on 2/3 of the screen from the middle to the right side. After about 35 minutes the problem goes away.

You are getting the issue on a cold start which means the LCD Panel is bad. It is usually the inverters that cause the issue. They are what light up the panel. This problem was present in many of Sony's LCDs released around the same time as yours.

You can check the voltages to see if the inverter boards are functioning correctly. If Inverters should be replaced. Part numbers:
Inverter Left: 1-789-839-11
Inverter Right: 1-789-840-11

If the voltages are fine or the Inverters did not fix the issue, you need to replace the whole LCD panel which is very expensive. The part number depends on the serial number of your TV.

1-802-491-12 for
S/N 8,000,001 TO 8,199,199 AND 8,500,001 TO 8,599,999S/N

1-802-491-31 for
8,200,001 TO 8,499,999 AND 8,600,001 AND UP

The inverters list for $93.11 each while the LCD Panel lists for $1400 with a $3100 core charge.

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3 Answers

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Your backlight is gone. LCDs usually use CCFL (Cold cathode Fluorescent Lamp) for backlight, maybe it's your CCFL power inverter (power supply for the CCFLs) or the CCFLs themself.. You probably won't be able to fix that for yourself :(

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1 Answer

I have a tomtom one with a damaged lcd screen.

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1 Answer

Cyberhome DVD Player Ch-LDV 700B

Sound like you have a back-light issue with the LCD. Not sure what kind of technology they use to back-light the LCD, but on all LCD monitors and TV's they use CCFL. Cold Cathode Fluorescent Lamps can burn out or can get damaged. Not sure if the DVD player uses them or not, you just need to open the back panel of the LCD and see what they use. Also CCFLs need an Inverter circuit to convert the DC current to AC current. If it uses CCFLs than it can only be 2 things the Lamps or the Inverter circuit. Check the lamps, if they look dark at the ends, than most likely a bad lamp. If the lamps look fine, than you will need a volt meter to check the status of the inverter.

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