| Author |
Message |
tommoose13
Joined: 28 Feb 2016
Posts: 4
Location: Manitoba, Canada
|
 Posted: Mon Mar 28, 2016 2:53 pm Post subject: Sharp lc-42D62U - Mainboard faulty. Is PSU faulty too? |
 |
|
So I'm trying to repair a Sharp Aquos 42" (lc-42D62U)
I have identified the source of my problem as being the mainboard. I ordered a replacement and it came faulty as well, but even less functional than my current mainboard.
With current mainboard, the tv has flickery pixels, but with the replacement it would just go to a white screen then into emergency power-lock state. (I tried a few hard resets/to get into a recovery mode, but to no avail) Put the original board back in, just flickery pixels. (Images in link below)
The seller never claimed that it was tested working, and I have been refunded for the faulty replacement. I am ordering another one, but I am wondering... Is my power supply possibly damaged and did it kill that board? Or would it probably be fine since it works with the current one? I'd really like to avoid ordering the power supply too, as it's not cheap and I've already sunk a little bit of money into this project. :|
Any thoughts or opinions on the matter would be greatly appreciated! :)
http://postimg.org/gallery/kev6zi2g/ |
|
 |
Google
|
 Post subject: Advertisement |
|
|
|
|
kuhurdler
Joined: 28 Dec 2006
Posts: 2879
Location: Overland Park, KS
|
| Posted: Tue Mar 29, 2016 7:14 am Post subject: |
|
|
| have you measure the power from your power supply? If so, are they close to what they are supposed to be? |
|
|
tommoose13
Joined: 28 Feb 2016
Posts: 4
Location: Manitoba, Canada
|
| Posted: Tue Mar 29, 2016 12:42 pm Post subject: |
|
|
I haven't tested the power supply, and my power supply board is labelled very poorly. there isn't anything labelled for voltages as far as I can see. Mind you, I'm no expert in testing TV power supplies, only computer PSUs  |
|
|
kuhurdler
Joined: 28 Dec 2006
Posts: 2879
Location: Overland Park, KS
|
| Posted: Tue Mar 29, 2016 2:11 pm Post subject: |
|
|
my vote is for a new mainboard. I can't find anything on what values the power supply are supposed to output.
I have seen several of these that you can fix by simply reheating the chips on the mainboard. you would need a hot air gun to do that. |
|
|
tommoose13
Joined: 28 Feb 2016
Posts: 4
Location: Manitoba, Canada
|
| Posted: Thu Mar 31, 2016 11:20 am Post subject: |
|
|
Awesome! Thanks for the advice  |
|
|
Google
|
| Post subject: Advertisement |
|
|
|
|
manmike
Joined: 29 Jan 2015
Posts: 4
Location: USA
|
| Posted: Thu Apr 28, 2016 8:23 pm Post subject: |
|
|
| This issue is deferentially a defective main board (Video processor IC). Because your pictures the power supply is fine. Look for a replacement main board. Check your main board part number for proper compatibility. |
|
|
|
FAQ
Search
Register
Log in
