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r-p replied to Occasional red picture on LG 60PZ950

in Troubleshooting TVs and Video Sources

01-12-2023, 10:47 AM
Re: Occasional red picture on LG 60PZ950

As it happens, I produce a lot more electricity that I use (>2MWh) so as long as I subtract production from usage, it's OK. Also means it WILL retire within a few years even if the repair is succesful (coming 10 years will see the subtractionpercentage fall to zero).
(Do have two 55" Samsungs with different issues waiting in line to be combined into one functioning one)....

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r-p replied to Occasional red picture on LG 60PZ950

in Troubleshooting TVs and Video Sources

01-09-2023, 06:59 AM
Re: Occasional red picture on LG 60PZ950

Thanks, that's new information for me. Any links to discussions/articles about this?

Thanks! Where did you find this? Personal stash or somewhere on the net (which means I suck at searching...)?

Whenever I get the balls to go at this again, I will gve it a try.

Just repaired another lead-free-solder-sucks problem on a mouse, so if diif does have more info, I still have that as a back-up-plan (though BGA soldering is far beyond my capabilities)....

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r-p replied to Occasional red picture on LG 60PZ950

in Troubleshooting TVs and Video Sources

01-04-2023, 06:58 AM
Re: Occasional red picture on LG 60PZ950

Dutch LG are utterly useless. They mention that it is not possible to update via USB (I told them I have a JIG programmer) and that I should use a Chromecast if I wanted to keep using the apps.

Maybe I'll try LG international/USA.

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r-p replied to Occasional red picture on LG 60PZ950

in Troubleshooting TVs and Video Sources

01-02-2023, 08:02 AM
Re: Occasional red picture on LG 60PZ950

After being in the way for years and years and even having bought a JIG to program it, it is time to give it a final go.

Been postponing it for fear of messing it up and I am surprised the wife hasn't filed for divorce yet with that thing lying around.

So, what do I need?

I found a zip-file containing e.g. an excelfile named "SVC ROM Mastersheet" and an LG PDF updated 04/21/2010 detailing a Panel maldisharge fix.

One reason for postponing is also because the Excelfile...

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Last edited by r-p; 01-02-2023, 08:16 AM.
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r-p replied to Dell 2407WFPb Monitor - Bad Cap

in Troubleshooting Computer Displays

06-29-2020, 03:59 PM
Re: Dell 2407WFPb Monitor - Bad Cap

Still going strong, being used as gaming monitor by my son a few hours a week.

I did notice the 230V~plug being finicky. A Display-Port-to-DVI converter worked fine the first day, but did not work at all the second day. When replacing it with a DVI-DVI cable in a very confined space, the monitor would turn off several times when touching the powersupply-plug going into the monitor even though it was securely mounted. Afterwards it worked fine, so the DVI-input on the Dell was not the problem.
But since this 14$...

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Last edited by r-p; 06-29-2020, 04:00 PM.
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r-p replied to Dell 2407WFPb Monitor - Bad Cap

in Troubleshooting Computer Displays

05-12-2020, 03:37 AM
Re: Dell 2407WFPb Monitor - Bad Cap

The lower soldering has clear separate strands visible. I'd like to see a nice smooth blob of solder cover them and keep them together. But I think it will be OK, I'm just nitpicking.

Yours looks, imho, a little but like the second or third solderjoint in the pic below.
...

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r-p started a topic Maldischarge-link that fixes it with replacing caps

in Troubleshooting TVs and Video Sources

01-21-2020, 05:16 PM
Maldischarge-link that fixes it with replacing caps

Starting this thread because Capkid doesn't seem to be reprogramming controlboards anymore (LG 60PZ950 with red maldischarge) and my game-plasma also has maldischarge (Hitachi 42PD3200). So I will grasp at straws to keep them running. I am extremely bad at throwing stuff away.

Is there any merit to [URL="https://ffseb.wordpress.com/tag/plasma-mal-discharge/"]this link[/URL]?

Very short version: Specific caps seem to loose their capacitance and/or increase their ESR. This may cause the maldischarge. Replace them with better/bigger/newer ones and problem solved....

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Last edited by r-p; 01-21-2020, 05:27 PM.
r-p replied to Fun with a new 100W power supply...

in Troubleshooting Power Supplies and Power Supply Design

11-18-2019, 04:38 PM
Re: Fun with a new 100W power supply...

It would whistle when driving above 100km/h or when the wind was hitting it at a certain angle... Then again, many campervans have them mounted on the roof.

Obviously you know that an inverter or a grid-tied-inverter is a humongous difference.
I do not know your expertise level, so I might be insulting you, but for me as an EE this is something I wouldn't even contemplate trying......

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r-p replied to Pic of cap, is it a Badcap?

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

11-03-2019, 03:02 PM
Re: Pic of cap, is it a Badcap?

Hi. Since I never throw something out... it was easy to find the old cap again.

The blue one is the old cap. The brown one is the replacement sent by the company. But it is build-in, and obviously the text is on the bottom side

The second pic is where the 'laquer' was broken, but no obvious spillage of any kind....

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Last edited by r-p; 11-03-2019, 03:04 PM.
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r-p replied to Pic of cap, is it a Badcap?

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

11-02-2019, 03:18 PM
Re: Pic of cap, is it a Badcap?

Follow up: I replaced the cap with a (probably) Chinese capacitor of pretty much same size and little bigger capacitance and it worked perfectly. (450V 470uF 105ºC iirc instead of the original Sprague 400V 390uF 105ºC cap)

I made a joke about the thing only living for ~25 years before failing on a Dutch electronics forum (the powersupply is from a [URL="https://www.delta-elektronika.nl/"]VERY reputable Dutch powersupply maker[/URL], not to be confused with powersupply makers with the same name from other countries. E.g. >90%...

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Last edited by r-p; 11-02-2019, 03:37 PM.
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r-p replied to Fun with a new 100W power supply...

in Troubleshooting Power Supplies and Power Supply Design

08-10-2019, 12:52 AM
Re: Fun with a new 100W power supply...

This is my 185Wp powersupply...

Mounted in about an hour (pressed for time, including railings, wiring etc.) last year before driving into the UK during what was pretty much a heatwave.

45V 5A rewired for 22V 10A and hooked up to a China made 24 to 13.8V DC-DC converter (input range 17 to 40V iirc) to feed two Peltier coolingboxes.
It wasn't perfect and when driving through the shade of e.g. trees, you would immediately hear the dip from the fan speed on the coolingboxes. So eventually I hooked...

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Last edited by r-p; 08-10-2019, 12:53 AM.
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r-p replied to "Power Optimizer" (solar) internals

in General Electronics Technical Discussion

09-23-2018, 03:48 PM
Re: "Power Optimizer" (solar) internals

We've had discussions on an electronics forum about the working, but no one has ever opened one (from the people who contributed).

Father-in-law has a SolarEdge system. These optimizers deliver 350V at all times. (If I understand correctly).
So the best I can come up with is that each module (lets say 10) knows what MPPT power it can achieve and communicates this through the powerwires to the inverter. This one adds up al this power, lets assume 1050W and devides this by 350V (which it wants to see). So the optimizers...

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Last edited by r-p; 09-23-2018, 03:52 PM.
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r-p replied to Adding fans to Panasonic Plasma

in Troubleshooting TVs and Video Sources

09-23-2018, 03:18 PM
Re: Adding fans to Panasonic Plasma

I often use the 5V powersupply which is normally strong enough (enough current capability to run a few extra fans) or indeed a 12-15V supply with some resistors. Not all 12V fans will run, or better not start up of off 5V.

I use old computer-/server-fans, not really quiet ones, so I need to drop the voltage more to get them to an acceptable soundlevel compared to new quieter fans

Two of my examples. In no way a perfect solution, but it may help to get ideas.

A 60" plasma, never used them until a fault...

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Last edited by r-p; 09-23-2018, 03:32 PM.
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r-p replied to SONY PFM-42B1E error, pic inside

in Troubleshooting TVs and Video Sources

09-23-2018, 02:51 PM
Re: SONY PFM-42B1E error, pic inside

I'll go and fiddle with the voltages. Which is hard as it is very heavy and I don't have an official stand for it. The stand I made for it won't let me get to the PCB's in the back.. But knowing it has a slight chance of working again is enough to try!

Thanks!

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r-p started a topic SONY PFM-42B1E error, pic inside

in Troubleshooting TVs and Video Sources

09-23-2018, 06:16 AM
SONY PFM-42B1E error, pic inside

So what's wrong with this one?

[offtopic]
I have several Plasma's (all gotten for free/picked up from the trash).
My 60" LG needs reprogramming of the ctrl board because of the red pixel storm issue, and might be fine after this, but so far all my efforts of getting info and contacting people in the know have not resulted in enough information to tackle this.

My 42" Hitatchi has a red and green pixel storm issue but adjusting the voltages cannot get rid of this. All caps seem (optically) in good order.
[/offtopic]

And...

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r-p replied to Dell 2407WFPb Monitor - Bad Cap

in Troubleshooting Computer Displays

08-27-2018, 04:36 AM
Re: Dell 2407WFPb Monitor - Bad Cap

[I]Edit: nevermind... The guy using 24V was me and all my measurements were with my then faulty powersupply (since replaced the capacitor and it is fine again), so any measurement I did back then is untrustworthy. So I cannot answer your question.[/I]

Original answer before the edit:
I'll try to find my post, but I remember having tried several voltages (adjustable powersupply) after the hack. I cannot recall if I went as low as 16V.

It worked fine for years, but then someone posted a link to dirtcheap replacement...

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Last edited by r-p; 08-27-2018, 04:48 AM.
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r-p replied to Picture disappears after minutes Hitatchi 42PD3200

in Troubleshooting TVs and Video Sources

03-02-2018, 07:02 AM
Re: Picture disappears after minutes Hitatchi 42PD3200

We decommissioned it because it displayed the failure-mode (=going black) on about 4 separate occasions on two different days.

I just played on it for 15 minutes and it won't go black whereas before it would do so within 5 minutes.

I will remove the temporary 26" in front of it and make it the main gaming monitor again. It will undoubtedly fail again once the kids go play on it in the not too distant future and I will answer your questions then. Thank you for now for taking an interest!...

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r-p started a topic Picture disappears after minutes Hitatchi 42PD3200

in Troubleshooting TVs and Video Sources

02-28-2018, 04:38 AM
Picture disappears after minutes Hitatchi 42PD3200

Game monitor. Green snow/haze issue since getting it, but worked acceptable for few years. Then it got worse, tweaked voltages and works fine again and mounted it on a stand with wheels, but no sound so had to go through the issue of taking it off (2 person job), find that I forgot to hook up soundamplifier PCB and remount it (3 person job).

But now it developed a new issue: it works fine, but after a few minutes, the screen goes black.
I am pretty sure the on-screen volume control does not show either, but the sound still does work (so it does not go into some protection mode)....

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Last edited by r-p; 02-28-2018, 04:41 AM.
r-p replied to Dell 2407WFPb Monitor - Bad Cap

in Troubleshooting Computer Displays

02-26-2018, 03:53 PM
Re: Dell 2407WFPb Monitor - Bad Cap

Wow, didn't know these boards were this cheap!

I think I'll order one, 5 years after initially finding this thread, deciding the powersupply board was beyond economical repair and having run the monitor since then on a laptop supply...

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Last edited by r-p; 02-26-2018, 04:01 PM.
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r-p replied to Occasional red picture on LG 60PZ950

in Troubleshooting TVs and Video Sources

02-19-2017, 03:28 PM
Re: Occasional red picture on LG 60PZ950

I have been fiddling with the voltages, but could not find any settings to get it better.

I used [URL="https://www.badcaps.net/forum/showthread.php?t=33393"]this thread[/URL] to trigger the testimage setting of the control board (post 11).
As far as I could tell, that seems to work just fine, although the white screen that scrolls to black was less than perfect. But this only meant that the white opposite the black scrolling part was not bright white but somewhat less 'light' white. Much like the pics in the thread...

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Last edited by r-p; 02-19-2017, 03:37 PM.
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