[sycayersou]

Originally Posted by YuriTokoro

Hi.
Would you correct my English, please?

Gladly, my English is impeccable.
(I'll also brush up your grammar, is places, okay?)
(And I'll bold the changes I make, so you can see them.)

"My Guitar"

My guitar is a Gibson LesPoul Custom. It’s been broken. It doesn’t make sound. I thought it might due to a disconnection, so I took it to a guitar repair shop today. They didn’t say how many days they need to repair it.
I don’t have a guitar to play now!

Speaking of a guitar, I used to have electric guitar lessons and the teacher was very good. I have met two great teachers and he is one of them.
The most impressive words he said was, “I don’t judge students' or other people’s performance negatively.”
Actually, he had never said “No,” even though/if [I'm not sure which you intended here, so I gave both ^^] I played badly. Even I tried strange ways, he didn’t say “No” or “It’s impossible.” I was very happy and enjoyed liberty in the class.
What a fond memory! I wish I could play my guitar just now!
Thank you!

Some of these changes just make it read nicer (and keep your intended message intact), some of them are grammatical niggles that I decided to correct.
^//^; sorry.