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Search: Posts Made By: Ierwin
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 04:17 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

Its time to give up unless I find a really cheap mainboard I think.
Thank you for the help, I have now taken it to the point where the mainboard is definetly toast.
I thought it would be smarter to...
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 03:32 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

I went up until 200C with the oven and left the board in for 10 minutes.
No change at all and I fear if I go higher the plastic ob the connectors could melt.
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 03:29 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 02:39 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

Do you mean this tiny C? With all cables disconnected I'm reading 0V.
Might be short but didn't check for other parts in parallel yet
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 01:51 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

Oh if you or anyone else has a chance to get their hands on the correct panel.bin I would still be very interested. As far as I understand I could use a replacement Mainboard from a TV with a...
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 12:55 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

I don't remember what Temperature I used back then, it's been 15 years.
Some sites suggested starting at 100c and working up from there so that's what I'll do
As far as I remember you can't really...
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 12:29 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

What temperature do you suggest?
I once got a GPU back to life with this technique so I know it might be worth a try
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 11:52 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

So a loose BGA maybe? That's probably not repairable. But it would be possible that the connection was bad/failing and when I applied cooling spray the temperature stress on the soldering joints made...
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 10:39 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

I found that section of the SM earlier and checked. I'm not at home right now and don't remember the voltages but both were equal.12V I think. Definitely not 0
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 09:53 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

Okay so I measured all the ribbons with a continiuty tester (beeping).
I slowly draged the probes over the contacts of the connectors on each side.
I admit I did not take the time to probe each of...
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 09:01 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

pressing menu the backlight goes brighhter but nothing apears on the screen.
I have never had a panel.bin on my USB stick, so it should never have overwritten. But because it stopped working after...
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 06:26 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

In the Service Manual is says:
Updating panel file
Inside of the BIN_FILES folder must appear
as below. Select the appropriate panel file
from O2_PANELLER.rar in the WEB folder.
Copy the file in...
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 05:16 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

according to the small sticker on the back I think I have a 55C46 Panel. At least that is the number that comes closest to the filenames in the zip.
But no file for that in the zip :(
Forum: Troubleshooting TVs and Video Sources 01-25-2022, 12:58 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

thank you so much!
But how do I find the panel type? I was hoping it was on one of the bar codes but havent found a mathcing number yet
Forum: Troubleshooting TVs and Video Sources 01-24-2022, 05:01 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

It also says in the manual to update the panel.bin and there ist a description how this file has to be placed inside a folder on the USB stick.
I do not have a panel file and all the directories in...
Forum: Troubleshooting TVs and Video Sources 01-24-2022, 04:50 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

So since I have 12V on the TCon Fuse the next step would be to check "L402" and "Tcon_On". I dont know where those are
Forum: Troubleshooting TVs and Video Sources 01-22-2022, 05:25 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

I have an update but at the moment it is not a good one:
I did some trial and error with various USB sticks and SW versions, pressing buttons, pluggin in, plugging out, never got anything on the...
Forum: Troubleshooting TVs and Video Sources 01-22-2022, 04:39 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

Okay, that sounds like its worth a try.
Also the links you posted really make it seem like the mos common issue with these sets are software related.

You are right about the chassis btw, it is an...
Forum: Troubleshooting TVs and Video Sources 01-22-2022, 01:56 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

Uhm...maybe I should clarify that the FireTV logo that can be seen on the photos does NOT come from the TV but from a TV stick I used as HDMI Input.
So just in case this may have caused confusion. I...
Forum: Troubleshooting TVs and Video Sources 01-22-2022, 10:51 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

I didn't check any voltages at all yet, but will defined do.
Never heard about using s terminal program with a TV.
Im working in IT (although a different field) so that's a part of TV repair I am...
Forum: Troubleshooting TVs and Video Sources 01-22-2022, 06:48 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

When both Cables are connected to the T-con the screen just stays black with the backlight lit. The oly way I can get any picture at all is disconnecting left ribbon
Forum: Troubleshooting TVs and Video Sources 01-22-2022, 03:31 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

Okay so I just gave the cooling spray a try. I disconnected the left ribbon cable so I got a good picture on the right side. As said before this fades to gray after a few seconds.
By cooling the MB...
Forum: Troubleshooting TVs and Video Sources 01-21-2022, 08:48 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

Could you explain which Testpoints I should be checking?
I did some searching yesterday and found the t-con fairly cheap online. Would be definetly worth to repair the set of it turns out that only...
Forum: Troubleshooting TVs and Video Sources 01-20-2022, 02:58 PM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

So I did some reading and came across other threads of people having the same or quite similar issues.
One suggestion is always to check the capacitors on the driver board of the faulty side for...
Forum: Troubleshooting TVs and Video Sources 01-20-2022, 02:13 AM
Replies: 50
Views: 2,188
Posted By Ierwin
Re: Grundig 55 GUB 8860 - bad T-Con or bad panel?

so its a panel issue?
Anything worth checking or is thin generally an unrepairable thing?
Showing results 1 to 25 of 57

 
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