Question about Acer NSK8458AN Keyboard

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My laptop Acer asphire displays the symptoms of a stuck key error, but when I removed the key board the same problem occurs. the nuber 5 key still stuck.... but there is no keyboard installed anymore.

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Since I see that you are comfortable with your computer I would like to recommend trying two different things. First off try using an external keyboard. See if this stops the error. If that does not then take the computer apart and remove the CMOS battery from the motherboard.

Posted on Jun 04, 2010

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6ya6ya
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Posted on Jan 02, 2017

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Sony Bravia KDL-40EX500. Plugged in power and no backlight. No pic no sound. Could it be the power board or inverter board? How can I test these boards? Thanks.


SELF DIAGNOSIS FUNCTION
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED will automatically begin to fl ash. The number
of times the LED fl ashes translates to a probable source of the problem. A defi nition of the STANDBY LED fl ash indicators is listed in the
instruction manual for the user's knowledge and reference. If an error symptom cannot be reproduced, the remote commander can be used to
review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.
DIAGNOSTIC TEST INDICATORS
When an error occurs, the STANDBY LED will fl ash a set number of times to indicate the possible cause of the problem. If there is more than
one error, the LED will identify the fi rst of the problem areas.
Result for all of the following diagnostic items are displayed on screen.
If the screen displays a "0", no error has occurred .
Diagnostic Item
Description
Number of times Standby
LED blinks Possible Location
Main Power Error 2 G2HE/GD2 (Power) Board
Audio Error 3 A (Main) Board
Balancer 4
LCD Panel
Inverter Board (ETC-Inverter MT Board) for 32" & 40" Models
TCON Error
5
LCD Panel
TCON Control MT Board
HFR Error 5 LCD Panel
Backlight Error 6
LCD Panel
Inverter Board (ETC-Inverter MT Board) for 32" & 40" Models
Temperature Error 7 A (Main) Board

This should help you narrow it down. I am also attaching the service manual for you. https://files.acrobat.com/a/preview/16a56e45-a439-48bc-8770-21638f2bab68

Jul 04, 2016 | Sony Bravia Kdl-40ex500 Series 40-inch Lcd...

1 Answer

253.70101. Why does it keep cycling power every 5-20 seconds?


the caps are reading abourt right 7.5 uf for fan and 15 uf for compressor.

Jul 27, 2015 | Kenmore Heating & Cooling

1 Answer

Acer laptop stuck on Windows boot manager


1. Restart the Acer Aspire netbook by pressing the "power" button on the netbook's keyboard or by pressing the "CTRL," "ALT" and "DEL" keys at the same time.
2. During startup, hold down the "F8" function key immediately when you see the "Acer" splash screen and the option for entering "Setup."

3. Keep pressing the "F8" key until the "Advanced Boot Options" menu appears.
If you receive a "keyboard error," restart the Acer Aspire and repeat step 2.

4. Use the arrow keys to navigate to the "Safe Mode" selection on the "Advanced Boot Options" menu.
The arrow keys are located on the right-hand side of the Acer Aspire keyboard.

5. Press the "Enter" key to execute the "Safe Mode" selection.
The Windows operating system will now start in "Safe Mode" and you can perform a system restore or make needed changes to get your Acer Aspire to boot normally again.


May 25, 2013 | Acer Aspire 5742Z-4601 : 2GHz Pentium...

1 Answer

My microwave is always running


It looks like your model is "GH4184XS##" If so, this sort of symptom is common in cases where the cooktop lights blow.

Several components on the control circuit board can be damaged, and other strange symptoms can occur.

But we see (and repair) this a lot. The problem is on the control board, which we regularly repair for $39.95.

At our Web site, you can get details of our service, plus we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This failure often occurs when a cooktop bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.

If you prefer, you can purchase a new control circuit board from the Pros here, our favorite supplier.

You can look up part number based on your full model number here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Oct 25, 2012 | Microwave Ovens

1 Answer

I have an acer laptop 5920, when I start the machine it goes on to a windows error recovery screen. When I enter launch startup repair, the screen goes blank then returns to display the same error screen.


try to shut down the laptop completely. Remove cables and battery into it. Then press and hold power button for 8 secs. Reinsert the cables and battery back then turn it on. Contact Acer if symptom persist

Oct 14, 2011 | Acer Aspire 5920-6727 Notebook

1 Answer

Well i recently just got an Acer Asphire one and the letters arent working. instead of letters they are numbers. but they are in numeric order.


I do not fully understand you problem.
But, on the right side of you keyboard there are some letters that also act as numbers. There is a toggle key that ghanges the key action. Usually labled "NUM LOCK".
Hope this helps.

Jul 24, 2011 | Acer Computers & Internet

1 Answer

T3 Treadmill Stuck Key


The cause of a “STUCK KEY” error message on the Basic or Advanced consoles. A stuck key error is displayed when one or more keys on the console or activity zone remain actuated for more than 45 seconds.
SOLUTION
Recycle the power. If the key remains stuck, the console will display “PLEASE WAIT” until the stuck key error is displayed again. Determine the stuck key. Replace the console if the problem is a key on the console. Replace the activity zone membrane keypad or the activity zone circuit board depending on the product if the problem is not in the console.

Jul 28, 2009 | Life Fitness T3 Treadmill with Advanced...

1 Answer

Notebook LCD


The screen problem sounds like a leaky capacitor or other failing component that once warmed up exhibits close enough to the correct values to correct the display problem (this usually progressively worsens with every boot of the laptop until no benefit occurs after warm up).

The beeping sound suggests a hardware error, and could be the keyboard. I have seen this on a Satellite and randomly pressing multiple keys on the keyboard momentarily stopped the beeping and allowed the unit to boot (yours seems to be getting past the error beeps on it's own though, suggesting another culprit). The problem could be bad RAM, so pulling one stick of RAM out at a time and starting the computer will eliminate or confirm the RAM as the problem. Other removable hardware such as the hard drive (you would have to install another hard drive to check this one), wireless card, PCMCIA card/device, USB removable hardware (mice, keyboards, wireless antennas, etc...), should be the first devices disconnected to eliminate as being the cause.

Sounds like a real problem child/laptop. Multiple simultaneous problems are always tougher to troubleshoot as they can compliment/effect each other, so look at the one that occurred first. Good luck!

Aug 29, 2008 | Acer Aspire 3680 Laptop

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