Acer E5-511-C0PC-CA cannot press L-Shift, 6,8,9,0, F2, F11 and from the numpad key 1

keyman

try many ways as posted but no luck, do not think it is dust related and it was totally working fine before and suddenly only those keys are not available. cannot use functional key to enter bios either.
also the mouse touch pad does not work either
external keyboard works fine.

any help will be appreciated!

JackE

Sounds like the KB and TP ribbon cable connectors need to be re-seated on the top of the mainboard a few times to clean the contacts. Unfortunately, the base cover, upper case, keyboard, dvd must be removed in order to access these connectors. Google the keywords 'e5-511' & 'disassembly' to see videos on what you'll be up against. Jack E/NJ

keyman

Thanks Jack, it actually has been done but the wired thing is only those keys not working

keyman

it actually was done see image thanks

keyman

hoe many times need to reserlt? there are four connectors and both connect keyboard and motherboard, one from power to close to a battery, one from top to connect to hard drive and one black

JackE

I usually re-seat a half-dozen or so times. Sometimes clean the exposed contacts with a q-tip moistened with rubbing alcohol. All my keyboards and touchpads have the integrated ribbon so only the mainboard connector to worry about. The small sliding wedges that press against and lock the mainboard & ribbon contacts together sometimes get misaligned and don't make good connections across all the contacts. I usually have to push both ends of the wedge with equal pressure with sharp tools to get the wedge fully inserted parallel to the connector. You really need two pairs of hands sometimes.   Jack E/NJ  

keyman

Really appreciate your help jack.  also the problem is after reseating the connector, you need to put all screws to test otherwise the keyboard won't work if not sticky to mother board so anyway to quickly test it before assembling back a dozen times?

JackE

No! I don't try to test it after each and every re-seat. I just pull it out and push it back in several times just to physically abrade the contacts from the friction of pulling it in and out. Almost like sandpapering the contacts but using the ribbon connector end itself as the sandpaper. Jack E/NJ

keyman

so need to connect and disconnect both upside (to the keyboard) and downside (connect to mother board) like ten times for three sets of connectors?

keyman

have reconnect thw blue one to synoptics few times

keyman

on the motherboatd side 
the left narrow blue cable connector seems a little lose

keyman

the very right side black big cable seems to have sliding part under white part, where to "sand" it? (on the top of picture there is a black thin line on top of white connector) thanks

JackE

The wide cable is pushed under the gray slider wedge and held there with one hand. There should be a line stripe on the ribbon that, when lined up with the white stripe on the mainboard, indicates it's fully inserted. Then the slider wedge is pushed in at each end so it locks the ribbon in place while pressing it's contacts against the corresponding mainboard contacts. Jack E/NJ

keyman

no luck aftet trying reseating several times still the same problem

keyman

actually not sure how to put the black connector under as the space is between the white and grey slider?

keyman

if put black one under grey slider the keyboard is completely dead with no response

keyman

looks like getting worst after plug and unplug the cables as more keys are not responding

JackE

Can you pull the slider out a bit to see if you can actually  see if the contacts are  on the mainboard or on the upper inside part of the white mainboard connector? Usually they're on the mainboard. What about the contacts on the cable itself? Do the gold colored metal contacts face up or face down toward the mainboard? Jack E/NJ

keyman

noticed when trying to bend the keyboard a little bit and hd the second blue cable . it was working but put it togethet on mother board flat then does not. Not always but some indication

keyman

still think the problem is around second white cable with tp on it,not sure if get it connect rigjt

keyman

weird findings when bend the black width cable towards the hdd and hold it then all keyboard keys work