Re: Sanyo lcd-37xr9da picture negative, abnormal display
i have the same problem too with my Sanyo LCD 37xr9da and im hoping that i can fix it.
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Cheers, Thanks. That's what I heard too so at least their pricing is consistent(Sydney).
what I ended up with was viewable. I've just offloaded it but it appears to me this is what goes on these sets and around the 2 year mark.
I'm just glad my diagnosis was correct, good learning experience.
Thanks.Leave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Hi mate. just heard back and for me it was a faulty tcon. haven't viewed the unit yet. just got the call. hope this helps in some way, apparently the part was about $150 from Sanyo. maybe u can source a new unit from them?Leave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Tried the second TCON and could not get any image persistance to occur no matter how long it was on.
Time to give up and live with what I have. Lesson learnt.Leave a comment:
-
-
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
The still shot does not have to be on for too long for it to occur. Am I worrying about nothing or could a slightly sus tcon do this as well?
I'm watching it next to my 1080i crt. I'm yet to find a large flat panel which comes remotely close to the definition of "outdated technology".Leave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Many LCDs have problems with temporary image retention. If a static image remains on the screen for long time, it "burns in". However, the burn in is temporary - a few flashes between white and black is usually enough to clear it.Leave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Ok, the good news / bad news with the latest TCON. The good is I now have a complete picture which is viewable. The bad is I have the brightness up pretty high to make it ok, plus for want of a better word "image burn?"
Basically I'm getting after images especially on anything that has been a still image similar to what can happen on the PLasma screens.
It does not happen for the first minute or two but once the set warms up (I suspect the TCON getting hot) it happens quite easily and does not clear.
Here's some shots.
Original TCON, First replacement with half good/half bad.
complete picture which seems okService menu white screen. Note the after image word "exclusive" leftover.
after image from the service menu.
I'm going to pull this set apart again and put the second board with half screen ok and see if I can replicate the after image there as well.
Has anyone seen this before? I thought it was only plasmas which have this problem. It's as though there is some residual current left in the TCON circuit from the previous images?? Sounds crazy I know.
The funny thing is the picture is watchable as long as you don't get a still image on screen for too long.Attached FilesLeave a comment:
-
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Thanks. You're the first person to apply the same logic as myself and suggest TCON fault with the evidence to date.
Hope to post some good news here soon but I will not be surprised that I get another dud. If it does go well I think I'll heatpad all the chips to the metal cover as they appear to have done on the T370HW02 V402 TCON.Leave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
If replacing the tcon fixed half (one side?) of the screen, I'd say that confirms the problem is the TCON and not the panel.
PlainBillLeave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
No worries. i managed to get a used tcon from china but i believe it was a dud and have requested and replacement which arrived in Sydney yesterday. The first board fixed right 50% of screen perfect, left side still noisy but different symptoms. I believe I'm on the right track.
had to lodge a PAYPAL dispute to get things moving(it motivated the seller). Hoping the second board is better.
I am starting to wondering if these have a definite issue around the 2 year mark. I've since seen about 2 or 3 others for sale with similar symtoms including a Samsung which i know also uses the same AUO LCD panel/TCON combo.
I have had some suggest panel fault but I'm still not convinced and hopeful TCON only. Since the symptoms have changed I'm pretty confident it's going to be a TCON and I expect yours will be too.Leave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
hey mate, just wanted to touch base with u if ur still watching this thread. The TV is currently at Sanyo, don't have any more info at the moment but wanted to make sure you knew I was still thinking of you. When I hear more I'll post it here.Leave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Yeah I've done the google bit but when you get it looked at by SANYO it would be interesting what they quote for a brand new board. I'm not sure if all the boards you see on the net are new. Some come out of stripped down broken sets.Leave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Google search for the Tcon, from my research I've seen it from about AUD$50-$80. IF you can get it that is, I searched using the part number u posted. Not sure how it all works, one of the ones I saw with the same part number said it was for a different named panel, think I saw a couple though compatible with AUO panels.Leave a comment:
-
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
My tv is going to sanyo next week for assessment. When I hear back I'll post here what they said. Maybe that will help you.
A brief conversation I had with a sanyo tech said it would either be the Tcon or the Panel. So 1 cheap or 1 expensive item.
Will keep you posted when I know more.Leave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Unbelievable. I can't take a trick. desparate to get someone to confirm my fault and I find this is my first reply asking me to give an opinion on a fault.
Don't get me wrong, love to help but I'm not 100% sure of my issue although I would put money on it being a bad TCON.
Yours does look slightly similar to my problem with my original board which failed further making everything pale, whitish.
On the back of the TCON board top left square chip # U201 was red hot on my really bad board. On the replacement it was cool.
Good luck on finding a good used board. Stay away from Chinese TAOBAO sellers.
The service manual is not that good.
you can get it here.
I could not upload it for some reason.
If you decide to use the service mode, do not play around with the settings unless you know what values they should be. There is a white, red,green, blue and black pattern you can turn on. This did not help me much as it looked pretty normal so I guess that means the panel is good?
I really need an experienced tech to confirm my problem as being a bad TCON.
Good Luck.Leave a comment:
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Hi.
I think I have a similar problem with my 37xr9da, could you look at these pics and tell me what you think?
<edit> forgot to mention those where taken after a full reset, when i start the tv up now the "SANYO" logo is excessively bright red and bleeds out with purple highlighting, and the N appears very very jagged </edit>
http://i197.photobucket.com/albums/a...0-09180903.jpg
http://i197.photobucket.com/albums/a...0-09180930.jpg
http://i197.photobucket.com/albums/a...0-09180952.jpg
http://i197.photobucket.com/albums/a...0-09180956.jpg
http://i197.photobucket.com/albums/a...0-09181002.jpg
http://i197.photobucket.com/albums/a...0-09181032.jpg
http://i197.photobucket.com/albums/a...0-09181106.jpg
http://i197.photobucket.com/albums/a...0-09182820.jpg
http://i197.photobucket.com/albums/a...0-09182851.jpg
more pics, sorry for posting it this way but had already deleted from hddAttached FilesLast edited by pigdaddy; 10-10-2011, 03:46 AM.Leave a comment:
-
-
Re: Sanyo lcd-37xr9da picture negative, abnormal display
Here's an update at where i am at with this TV. Managed to find a used TCON online. This is now the result I have. As far as i am concerned this confirms my original TCON was faulty and the cause.
But now I have this result. There are 2 connectors, and I believe the output from J1 on the replacement TCON is also bad. i.e. the replacement TCON is a dud.
Notice the menu/service OSD is now the wrong colour and the variation in the white screen on both sides. right seems a little off white?
Can someone definitely confirm I am correct to say the panel is good and the TCON is still bad? It looks that way to me.
,,,Attached FilesLeave a comment:
-
-
Hi,
I have a VIZIO E70-E3.
Symptoms: Black screen, no picture, but LED backlights are working.
I probed the power board and voltages are as listed on the board.
Main board appears fine, too.
I believe the problem is either a bad T-CON board, or connection to LCD, or bad LCD.
There are two separate ribbon cables feeding the LCD.
If both are connected, the screen is black.
If only the ribbon cable that feeds the right side of the screen (when viewed from the front) is disconnected, the left side of the screen shows picture and... -
hi
i have a samsung lcd tv
it powers on with sound and backlight but no picture
all voltages from PS are good 12v 3.3v and 5v
whats odd is that at the tcon i tested voltage across the fuse on the tcon and i get 0v
i figured main board issue..so i ordered a used main board....when i put replacement main board in i still have same issue
no 12v at the tcon fuse
i disconnect the panel ribbon cables to rule out any panel issues and i still have no 12v at the tcon fuse
the odds of having 2... -
Just bought this for 10 bucks yesterday hoping to fix it. The guy said water dropped inside from a dehumidifier hose and it started showing black and white vertical bars then went blank. When I got it home and turned it on it came on fine and displayed correctly but I was noticing faint vertical bars in the image. After a little bit I turned it off and back on and it was a black screen again. I opened it up to check for water damage and corrosion but didn't find anything of the sort. I cleaned the ribbons anyway and reconnected them but still got a blank screen. If I disconnect the right side... -
Hi guys! I realized you have a lot of knowledge here so i am hoping you could point me in right direction with my odd issue.
The Tv is a Philips 58PUS8545/12, it had no picture but working backlights.
Original T-con:
Opened the Tv and tested to unplug one ribbon cable at a time. With this test i could see that i got fine picture on both halves as long as there was only one ribbon cable connected, with two connected picture were gone.
First replacement T-con:
I thought it might be t-con and ordered new t-con from china(supposedly tested)... -
This was my main TV for the last 6 years. I'm not inclined to throw out a $2600 TV so quickly so I'm trying to investigate the issue.
Problem
TV was disconnected from power for 6 months during construction. When I plugged it yesterday picture was fine, after 30 seconds it dimmed then started developing horizontal lines, picture then starts to ghost vertically until it degrades into vertical streaks. TV always displays a perfect picture when cold. I can unplug TV for 5 minutes and plug it back in and picture is restored for 20 seconds. I can also keep it in standby mode...
Leave a comment: