Asus q550lf keyboard b n space arrow keys not working

[krashton1]

Hello, I just bought this laptop a few weeks ago, an ASUS q550lf.

Regardless, certain keys will occasionally work and occasionally not work. Those keys are b, n, enter, space, left shift, left control, up, and down arrow keys and maybe some others that I have missed.

Normally I am very tech savvy but I can not figure out what is going wrong with this laptop.

When the keys are not functioning properly, it appears that they will not work unless I press them and leave them pressed for 3 or 4 seconds, then it will register a single click.

I do not believe that the problem could be dirt in the keys because this laptop is still almost brand new. I have not yet tried attaching an external keyboard but I would assume it would work, I will check it tonight.

The keyboard usually will not function for about 70% of the time it seems.

 

[jwl3]

Thank you for that awesome video. Gonna go home and try it out. Will report back but I have high hopes this will solve this annoying recurring problem.

 

[Derek_27]

After digging on the Internet for some time and having my keyboard replaced once, only to have it succumb to the same keyboard issues as everyone else. The problem lies in the ribbon cable connecting the keyboard to the mother board, this cable is compacted and creased under the battery and this compression is too much for the cable and will cause this problem. To fix this the battery needs to be removed the cable picked up and the battery put back without the cable underneath. Finally remove the crease in the cable by bending the crease backwards. https://youtu.be/_2O5SmtefgA
Watch this to see what I mean.

 

[jwl3]

Everything worked! That awesome video fixed my problem. Once I smoothed out the crease in the keyboard ribbon cable and flexed it backward to straighten it out, there are no more skipped keystrokes!

 

[shadowork]

re: the q550lf with certain keys not working. i also have this product. it's a hardware/engineering glitch. open it up & remove battery. find the large black keyboard ribbon. u see it has a severe crease in it. remove the exposed end from it's coupling & lift. look under & see the black plastic bottom of the laptop. NOTICE the structural rib which runs under the ribbon. this rib gives support to the thin plastic bottom panel. unfortunately, u'r keyboard ribbon cable also runs on top of it & u already know that the battery sits on top of that & in time crushes the creased part of the ribbon cable, where the plastic rib is located. it's always the same keys b/c the crush pinches the wire that controls just those key strokes. if u catch it sooner than later, u may be able to save it before it deteriorates further. also, if u have a q550lf, & maybe other 550's, here's the fix: apply some kind of thicker flexible tape to soften the creased area. reinsert the ribbon cable into position. gently pull up the now looped ribbon cable, mount the battery while the ribbon cable is pulled up. the ribbon cable will flatten out when u put the bottom back on. i tape mine to the memory card. this should work.
another way is to shave down the offending plastic rib, so it doesn't crush the ribbon cable when the battery is remounted.
if u look at the bottom of the case, it looks to me as if the engineers goofed. the ribbon cable almost fits into the space next to the structural rib, but is off by 1/2 inch. i'll bet all 550 models are like this. it's too bad b/c replacing the fricking keyboard is a major hassle, & it looks inevitable.

Hello, I just bought this laptop a few weeks ago, an ASUS q550lf.

Regardless, certain keys will occasionally work and occasionally not work. Those keys are b n enter space left shift left control up and down arrow keys and maybe some others that I have missed.

Normally I am very tech savvy but I can not figure out what is going wrong with this laptop.

When the keys are not functioning properly, it appears that they will not work unless I press them and leave them pressed for 3 or 4 seconds, then it will register a single click.

I do not belive that the problem could be dirt in the keys because this laptop is still almost brand new. I have not yet tried attaching an external keyboard but I would assume it would work, I will check it tonight.

The keyboard usually will not function for about 70% of the time it seems.

 

[Mohamed Eliyas]

i did not see the last answer,
i bought a UK keyboard and mount it with little fix.....hehehe.
yeah but the ribbon cable was probably the problem....now everything is working great.
but ASUS have to return the model...if they are really a company that wants to continue in the market.

 

[Mr nothing]

SOLUTION (or ONE of the solutions) ASUS K401lb

Problem: several keys on the keyboard are not responsive (something work, something do not)
-at the end of the day, the problem was found out to be the bad connection of the serial port.

Solution: (Spent 4 months trying to solve it. The solution, however, turned out to be very easy)

1. Cracking open your cover (be careful, I just broke couple of the pins surrounding the cover)

2. Within the motherboard of your laptop, try to look for the serial port (a sheet of wire, usually quite wide like 1.5 of your finger width) of your keyboard. Mine was like the zebra lines. The serial port or the sheet of wire can sometime be covered by a piece of plastic (usually white). For K401lb specifically, it was located just above the racks of battery slightly to the Right.

3. Make the port/connection stable by pushing it down and forward.

*4. If you have a can of compressed air, try to clean up the port and surrounding.

Da-Ta... If your issue is same with mine, you should be done here. Good Luck


Mr. nothing

 

[Evan_64]

I used the same method as the video and moved the ribbon cable for the keyboard to the other side of the battery. I've only been using it for a few minutes but my keyboard is much more reliable. If I have issues I'll reply to this thread, but I would recommend that solution.

Also, this laptop requires a lot of maintenance. I've had keyboard issues, audio de-embedding issues, audio level issues, file indexing issues, and a period of time where my hard drive wouldn't retain it's drive letter and so I'd have to reassign it a letter every day.

That being said, I like it a lot. I just wouldn't recommend it.