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We can't see LED light chip directly

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  • Computers & ... Master
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Post the laptop manufacturer name, and model number.
The model number is on the Bottom of the laptop.

Post in a Comment.

Plus add additional info about what are you referring to?

Offhand, I would guess a reference to the LED backlighting on the laptop.
If this holds true, and you have no Backlight, the normal procedure is to replace the LCD screen.

With most laptops utilizing LED's as a Backlight, the LED backlighting is incorporated into the LCD screen assembly, and that's why when the LED backlighting goes bad, the LCD screen itself is replaced.

Post back in a Comment.
Regards,
joecoolvette

Posted on Jan 23, 2013

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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My screen dont light on my aspire 7250


I have just fixed an Aspire 7250 with following symptoms: Only blue Power LED or battery charge LED come on, fan spins, no backlight, no video either on internal screen or VGA output.
Problem solved desolderig BIOS flash chip (W25Q16) and flashing BIOS 1.10 with an universal programmer.

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I have HCL Ezeebee desktop computer when we boot the system monitor, keyboard, mouse blink for a while and monitor (HCL) show 'no signal' message, and keyboard num lock led not display mouse i


No signal at the monitor indicates (if you know the monitor is working ok) a failure of the graphics chip or graphics card, The lack of indicator light on the num lock LED and the lack of power to the mouse would indicate that there is a major issue with the motherboard.
you can try using another monitor to confirm the problem lies with the graphics, and in the case of the keyboard and mouse, swap them for a usb version, if they work, the Ps2 ports are probably damaged.
I'd be thinking of replacing the motherboard

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Toshiba l355d - s7815 won't boot and screen doesn't light up


From your description you have a motherboard issue, the only way to rectify this, it must be replaced.

Mar 26, 2012 | Computers & Internet

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Will not power up has constant on off flicker , when I turn it on the green light clicks off and turns red and the cycle repeats. I have checked the fuses and also resolderd the power board. is there any...


Hi Eric,

First of all, thank you for contacting Fixya.com regarding on your TV problem.

I've suspected a convergence chips failure not the power supply board issue in this kind of symptoms. To confirm it, locate the convergence board inside the set, it has a Sanyo convergence chip STK392-110 that are mounted on the large heat sink. This board has a LED (light emitting diode) that will light up once the board gone to malfunction. Turn on the unit and then check if the LED will lit after the shuts down. If yes, then I would advice you to replaced both convergence Chips and check the resistance of the resistors in line with the +25V and -20V supply of the chips.
Let me know if the LED at the convergence board does not lit to continue our diagnosis... Check also the LED at the power supply board and on the deflection board(this is where the flyback transformer is located)

Have a nice day!

Goodluck and take care!

Kind Regards,

Jdvillanueva

Dec 03, 2011 | Pioneer PRO-99 TV

2 Answers

My compaq nc6000 laptop when i turn it on the fan fan turns for some secong after that it shuts dawn also it had bo ant display whta can i do?


Hi tadzfuture

HP COMPAQ NC6000 NOTEBOOK POWER UP FAILURE

This sounds like Graphics Chip failure or Motherboard Power Management Fault. However some other potential, less serious causes of the symptoms you describe must be eliminated first.

First, remove the battery, then connect the laptop, in a battery-less condition, directly to the mains electricity and power it up to test the boot process again. If no image appears but the computer seems to boot normally and the Hard Drive activity light flashes, there might be a faulty or failing:

LCD Panel Power Inverter (LCD Screens only)
Cold Cathode Backlight (LCD Screens only)
LCD or LED Panel

All these items are testable and replaceable. To be certain, send the image from the laptop to an external desktop monitor of LCD TV by pressing and holding the Fn key and then pressing the Function Key with the image of 2 monitors on it (often the F4, F5, F6 or F7 key).

If no illuminated LEDs are visible, particularly a Hard Drive Activity LED, then the DC Jack's connection to the Motherboard might have worked loose or failed or the Motherboard's Power Management System might have failed.

If when you power on the laptop you see a Power LED but no Hard Drive activity LED and nothing on the screen, the Graphics Chip might be faulty. Faulty Graphics Chips can are indicated by a regular flashing or permanent "on" state of the Power LED at the front of the notebook when you try to power it up and can be repaired by Ball Graphics Array Reflow or BGA Reballing. These repairs have an average success rate but can be expensive and must be done by an experienced specialist with specialist equipment such as an Infra Red Workstation, an Oscilloscope and a Micro soldering Station. The fault can come back. BGA Reballing generally achieves better, longer-lasting results than BGA Reflow but can be more expensive. A reputable, specialist motherboard component level repair centre should be able to offer you a No-Fix-No-Fee Graphics Chip, Motherboard Power Management System or Loose DC Jack repair service and a 3-6 Month Re-repair or Full Refund Post Repair Same Fault Warranty. Sometimes the surface of the graphics chip is too damaged to repair.

If the Graphics Chip or Motherboard is irreparable or the cost of Graphics Chip or Motherboard Component repair seems expensive to you compared to the current market value of the laptop, then consider buying a new laptop, having any important data transferred to the new laptop, formatting the old laptop's hard drive, offering the working components (LCD Panel, Power Inverter, Hard Drive, RAM Memory Modules, Battery, AC/DC Adapter, Wireless LAN Card, Keyboard, CPU, CPU Heatsink, CMOS Battery, Lid Frame, Chassis) of the old laptop for sale on eBay or some similar website to recoup some cash. Dismantled, functioning, 2nd User Laptop Components have far more cumulative value than an assembled, non-functioning laptop, which only has low scrap, value.

Also, always use a surge protector for computer equipment, never directly to the mains.

If the battery cells are dead, you may also require a replacement battery.


I suggest you take the laptop to a repair shop for testing of the components listed above and/or a quotation for graphics chip repair.


I hope this helps.

If this Answer goes some way towards helping to resolve your Query, Problem or Fault, please take the time to Rate it. Doing so helps Solution Providers, like me, better understand the needs and the point of view of Askers, like you, and guides us in exploring the best ways to provide the most comprehensive, useful and high quality Responses and Solutions we can. If you need further help, please do not hesitate to post another Question or add a Comment to this Question.

Oct 08, 2011 | HP Compaq nc6000 Notebook

2 Answers

Is turned on, won't turn off when I press the button and screen is blank.


Hi jorgensenspam

BLANK LAPTOP BOOT SCREEN AND CONSTANT POWER LED

You say nothing about the make and model of your laptop. You also don't say which Operating System you use, so my answer will be presented in general, Windows terms. If yours is a non-Windows Operating System, consider applying the logic and principles involved here to your own Operating System and, if in doubt, please feel free to add a Comment or Clarification to this Question, including information about the type, model and specification of your computer and its Operating System.

If when you power on the laptop you see a Power LED but no Hard Drive activity LED AND nothing on the screen, the Graphics Chip might be faulty. Faulty Graphics Chips can are indicated by a regular flashing or permanent "on" state of the Power LED at the front of the notebook when you try to power it up and can be repaired by Ball Graphics Array Reflow or BGA Reballing. These repairs have an average success rate but can be expensive and must be done by an experienced specialist with specialist equipment such as an Infra Red Workstation, an Oscilloscope and a Micro soldering Station. The fault can come back. BGA Reballing generally achieves better, longer-lasting results than BGA Reflow but can be more expensive.

A reputable, specialist motherboard component level repair centre should be able to offer you a No-Fix-No-Fee Graphics Chip repair service and a 3-6 Month Re-repair or Full Refund Post Repair Same Fault Warranty.

Sometimes the surface of the graphics chip is too damaged to repair. If the Graphics Chip is irreparable or the cost of Graphics Chip repair seems expensive to you compared to the current market value of the laptop, then consider buying a new laptop, having any important data transferred to the new laptop, formatting the old laptop's hard drive, offering the working components (LCD Panel, Power Inverter, Hard Drive, RAM Memory Modules, Battery, AC/DC Adapter, Wireless LAN Card, Keyboard, CPU, CPU Heatsink, CMOS Battery, Lid Frame, Chassis) of the old laptop for sale on eBay or some similar website to recoup some cash. Dismantled, functioning, 2nd User Laptop Components have far more cumulative value than an assembled, non-functioning laptop, which only has low scrap, value.

Also, always use a surge protector for computer equipment, never directly to the mains.

If the battery cells are dead, you may also require a replacement battery.


I suggest you take the laptop to a repair shop for testing of the components listed above and/or a quotation for graphics chip repair.

I hope this helps.

If this Answer goes some way towards helping to resolve your Query, Problem or Fault, please take the time to Rate it. Doing so helps Solution Providers, like me, better understand the needs and the point of view of Askers, like you, and guides us in exploring the best ways to provide the most comprehensive, useful and high quality Responses and Solutions we can. If you need further help, please do not hesitate to post another Question or add a Comment to this Question.
Thanks for using FixYa.

Sep 25, 2011 | Computers & Internet

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