WIFI error (i've already read other posts)

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hi everyone i'm new in this forum but i've already read other posts about this issue. my problem is the "error" under the wi fi setting. i did not try to boot or installing other rom. i bought my phone (a htc google nexus one) two months ago. it was used. for this 2 months it's worked very fine and did its job but suddently a day it started to be hot! it was so hot that i couldn't phone my girlfriend. 2 days later it stops with this high temperature problem but started with wifi problem. and it's about 2 weeks that i can't use my wi fi connection and it's frustrating because i can use 500mb/month and sometimes it's not necessary.
i'll summarize some info:
htc google nexus one
android 2.3.6
band version 32.50.00.32U_5.12.00.08
kernel version 2.6.35.7-ge0fb012 htc-kernel@and18-2 #1
build number GRK39F
please help me!!

That seems to be a hardware problem, so you should take it to service

ya sounds like a faulty phone man :/

unfortunately

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unfortunately the warranty is expired...
however is there a chance to save my phone?

maybe try flashing a new rom