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Garmin gpsmap 498 backlight

I have a Garmin gpsmap 498 and the backlight doesn't work. Don Adzigian seems to of found the problem but i can't figure out where the L-shaped ccfl (cold cathode fluorescent lamp.) is? any help with this would be greatly appreciated

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 4234 Answers

SOURCE: Backlight fluorescent lamps died

This note is primarily in response to dank84:

The "backlight" is built-in to the display panel itself, so there is no way to replace the lamp itself. In most cases, it is the "ballast" that has gone bad. This is a small board either on the side or bottom ofhte top case. There are a number of reasons for this to fail. Many times a bad battery or weak charge can cause extra current draw that pops a soldered fuse on the board. Other times, capacitors fail. Still others, the onboard transformers that convert the "low" voltages to "high" voltages required for the flouresceent lamp to fire go bad.

The bottom line is that this is not a consumer type of repair in most cases. Depending upon the age of the laptop and the skills of the local servicer, this may not be an econimical repair.

Dan

Posted on Jan 30, 2009

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  • 2567 Answers

SOURCE: samsung np-q45 cathode backlight not working if

Please refer to the following article for a detailed diagnosis of the problem:
http://www.fixya.com/support/r6430776-troubleshooting_laptop_power_failures

Posted on Dec 11, 2010

Ray-Tosh
  • 124 Answers

SOURCE: My Gateway notebook, model :

@bevrog

If you see the Fujitsu HDD model#: MHU2100AT. under BIOS setup, that means the HDD is there but the operating system is not loading up. Try the following:

1. Run System Recovery (turn the computer ON and press the F11 key simultaneously) - take note that this will erase everything and you'll start from scratch.
2. If you have a Recovery Discs, press F12 simultaneously upon boot-up and choose to boot from the CD/DVD drive
3. If a System Recovery Window came up (see image below), then proceed and wait until it restore Windows.

ray_tosh_5.png

If you don't get an image similar to the screen above, and you get an error like PXE Error Media State Media Disconnected, or 0x000000E or "An I/O Error occured" - this is a sign that your HDD is already failing and needs to be replaced. If you're still under warranty, call gateway support at 1-800-846-2000.


Good luck.

Posted on Sep 07, 2011

joecoolvette
  • 5660 Answers

SOURCE: I cant fix the backlight of the lcd screen of my laptop

If the Video Cable is damaged, you may want to think about obtaining a new one.

Apparently your solder connections didn't work, or you haven't repaired all of the damage.

Wires could be stretched and broken inside their insulation sheath, and you may not see it.
Use a multimeter, and perform a continuity test of each wire.

Inside the sheath of the Video Cable are wires that lead from the motherboard, and go to the screen Inverter.
You know this.

What you may not know is there are wires inside the sheath of the Video Cable, that lead to the wire/s going to the screen Inverter.
One of these wires may be damaged down in the sheath, and is not visibly apparent.

Suggest replace the Video Cable, and put your mind at ease that it is not the problem.

The CCFL in your Display Assembly is about 2mm Thick, and almost as long as the LCD screen is in height.

Not knowing the exact manufacturer and model number of the laptop;

1) I can't tell you if their is just one CCFL, or two.
The CCFL bulb should be located on one side of the LCD screen assembly. (Unless it is a dual CCFL model)

2) I can't tell you if your LCD screen backlighting is CCFL, or a series of LED lights.

It has been posted that you laptop may be a Sharp PC-GP10-CM

[ http://www.ebay.co.uk/sch/i.html?_nkw=sharp+pc+gp10+cm ]

The wires leading to the CCFL bulb are soldered to the ends of the bulb. Perhaps there is a bad solder joint,

http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/

Me?
I would replace the Video Cable.

Regards,
joecoolvette

Posted on Apr 25, 2012

SOURCE: can't fix the backlight of the screen of my laptop

I would normally say just purchase a new lcd screen, but since you mentioned some soldered wires that scares me. If my memory is correct the wires that go into the inverter come from the LCD screen. One normally has a white an pink wire with the end looking like the root of a tooth that goes into the inverter. The other piece that goes into the inverter is also from the monitor and it usually comes from the LCD Cable that is in the back of the monitor.

I'm puzzled over what you soldered. Maybe you should take it in for a diagnosis at a repair shop.

Posted on Apr 26, 2012

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