intermittently failing Keys on MBP 2011


i experience second time problem keyboard of mbp 15" 2011 (8,2).
first time in 2013.

3 days after expiring of warranty, these keys failed - first intermittently, after completely.
did cost me lot of money @ time repaired (it 1 of official apple service partner - told me replaced it).

now, again 2 years later, problem begins again same symptoms.
took off keys hoping cleaning help. space under keys clean.
after "cleaning" action, keys worked again (the mbp cooled down during time).


20 minutes happy - more using mbp again in hour after , more keys failed again.
now have thesis:
every time mbp gets warm/hot, soldering or material of keyboard risks less efficient (same problem dgpu-problem theses models ?) , keys above cpu begin fail (at least intermittently).

line key t o exactly on top of cpu (at least, hottest part of downside underneath these keys), , think might problem.
in case, beginning before mbp starts active cooling , without power-using.

there other users similar problems?

after short search found similar posting might confirm little bit thesis:

the fact there people make money nothing keyboard-repairs on mbp seems indicate there market - , therefore perhaps issue…

use nootebooks since 1994 (ibm, toshiba, panasonic) , never ever had problems keyboard - began mbp…. second time now..
 

well - days ago keys in mid of querty-line dead.

wrote warm part of keyboard … issue ?

before purchasing mmacbookpros had ibm thinkpads, toshiba pro notebooks , panasonic toughbook.
neither of them ever failed since mid-90´s. mbp´s first fail - , did twice!

- after burning lot of money 3 days (!) after warranty in 2013 mbp 2011 (400 eur) new keyboard (apple refused - opposite of world-class top-customer-service of ibm or toshiba before , after 2000) had again same issues same mbp now. did cost me 200 eur.
- spent 600 eur in 4,5 years. bad , expensive experience.

has made same experience dead keys , needed new keyboard?
 


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