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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Samsung > Samsung Hardware Repair

Samsung Hardware Repair Post here your Hardware Repairing Hints or Problems with Samsung Phones.

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Old 02-15-2015, 11:35   #1 (permalink)
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Samsung S3 common problems


Hi everyone,

I have here two Samsung S3, each with a very common problem upon Google search, but I haven't found a solution for any. Maybe you can help..

1st I have a i9300 with the very common problem of people not listening well during calls. Already replaced mic without success. Works fine with viber, etc, also, if during call I press a bit harder at bottom of the battery people listen better.

2nd I have a i9305 with a dead lcd. No falls, no cracks, nothing, just went dead! Tried the i9300 lcd and works fine. Already cleaned contacts, lcd pcb and still persists. I want to try a light reflow on the lcd pcb chips but I'm afraid to melt the plastic..

Can anyone help me with either or both these issues?

Thanks in advance.
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Old 02-16-2015, 14:31   #2 (permalink)
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Up.

Can't anyone help me solve or diagnose these issues?

TIA.
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Old 02-16-2015, 16:03   #3 (permalink)
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Quote:
Originally Posted by skor78 View Post
Hi everyone,

I have here two Samsung S3, each with a very common problem upon Google search, but I haven't found a solution for any. Maybe you can help..

1st I have a i9300 with the very common problem of people not listening well during calls. Already replaced mic without success. Works fine with viber, etc, also, if during call I press a bit harder at bottom of the battery people listen better.

2nd I have a i9305 with a dead lcd. No falls, no cracks, nothing, just went dead! Tried the i9300 lcd and works fine. Already cleaned contacts, lcd pcb and still persists. I want to try a light reflow on the lcd pcb chips but I'm afraid to melt the plastic..

Can anyone help me with either or both these issues?

Thanks in advance.


1. samsung gt-i9300 ways mic solution

rehot ic audio ... see picture below :







2. try to replace lcd her .... from your description above his troubled lcd
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Old 02-16-2015, 16:25   #4 (permalink)
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Thanks d-artigo,

Will try to re-heat mic ICs when I get home.

Regarding lcd, could it be a bad chip instead of whole lcd module? Can I apply voltage somwhere in lcd module to see if it works?

Thanks.
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