Re: 40" Tevion Model LCD 4040 dead
You maybe didn't seat the inverter power connector right?
You maybe didn't seat the inverter power connector right?
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Re: 40" Tevion Model LCD 4040 dead
i thought that but there twin inverters on these and just lifting the back does not move these wires at all the only wires on the back panel is the top buttons and the bottom power switch.Have you got a scheme for this psu tom so i can check working and in fault condition?Comment
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Re: 40" Tevion Model LCD 4040 dead
i think ive found the issue a bad scart socket pin shorting out!!!! i have just removed all solder from the pin pulled it back through and re soldered.hence every time i had it on the bench it powered up snow on screen without a scart plug inserted.Attached FilesLast edited by vinceroger69; 01-23-2014, 06:30 AM.Comment
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Re: 40" Tevion Model LCD 4040 dead
Sometimes there is a 5V or 12V signal on there... it could cause it though I'd be surprised if it could bring down the power supply.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 40" Tevion Model LCD 4040 dead
well it had sound but no picture so could it cause it?Comment
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Re: 40" Tevion Model LCD 4040 dead
Any backlight?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 40" Tevion Model LCD 4040 dead
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Re: 40" Tevion Model LCD 4040 dead
I would be surprised if that caused it, then.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 40" Tevion Model LCD 4040 dead
not sure powered cycled a few times now started each time was weird as it only seemed to do this with the scart in. once on the bench no source had snow every time as this has no built in freeview so i was always using the scart socket i will unplug the set over night and try it in the morning i guess.Comment
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Re: 40" Tevion Model LCD 4040 dead
guys in this ebay link you can see the pinout really good any idea what these mean
p-0 3.28 volts o-c -0.04 l-c 4.48 volts i have took voltages when the sets on and working fine will retest these if fails again now on the other connector inverter i guess 24 volts then ground and 1 unmarked wire it has 4.68 volts on it as well so may be connected somehow to l-c pin on connector http://www.ebay.co.uk/itm/Tevion-LCD...item4d07f4b0a1Comment
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Re: 40" Tevion Model LCD 4040 dead
listing is gone Vince should have grabbed the pic when you saw it.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: 40" Tevion Model LCD 4040 dead
will post some pics up luckily i took some whilst the back was ofAttached FilesLast edited by vinceroger69; 01-23-2014, 12:01 PM.Comment
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Re: 40" Tevion Model LCD 4040 dead
well tom you was right that was not the problem set still playing up the issue at the moment now is it turns on with sound fine just no back light just checked 24 volts was reading just over 24.3 volts so thats ok the only difference i notice between yesterdays reading and todays in fault condition is that the pin marked b-c reads -0.01 fault condition working was-0.04 but now when pictures on and sets working its -0.01 so not sure what the fault is these psu dont have bl on pins i wonder if its a mainboard fault? it took four times to power on with a picture using the remote all voltages are as per pin outs in a previous post.Last edited by vinceroger69; 01-24-2014, 12:45 PM.Comment
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Re: 40" Tevion Model LCD 4040 dead
I've got the exact same problem on a cello tv, sometimes switches on and backlight comes on then other times if you let it sit for a few seconds with no backlight then power off then on it usually kicks in, that was after a new power supply too, i'd be inclined to say it's a mainboard fault but thats just from my experience with my setComment
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Re: 40" Tevion Model LCD 4040 dead
thats what im thinking now too ive done a full recap of panasoincs on the psu voltages are spot on and stable in both working and fault condition these main boards are really hard to come by GERANIUM-PLUS-MAIN VER 1.3 i wonder if its possible to permanently connect the bl on pin to a live of some sort?Comment
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Hi all,
As the title suggests, how can I be sure that my EC chip is really dead?
I've recently gotten into this hobby of laptop repairs, and have successfully brought back to life a couple with some easy fixes, mostly shorted caps.
Now I'm working on HP Probook 455 G8, that had some "devil" run around on 3V line, burning a bunch of stuff. Luckily I have a dead 455G7 (for spare parts) so I managed to fix it (swapped burned parts) to a point that it will charge (both on barrel jack and usb-c), but it doesn't want to turn on. There is a 3V3 on a keyboard... -
hello guys,
i need help to repair a edm-033 ps2
history : as always hdmi port and usb ports destroyed after unplugged
after change them, ps5 dead too : 1 beep, no blue light. after inspection 1.8v power was shorted, and because of dead panasonic chip. after remove it : no short anymore
so i changed it
now i have got 5v stby,, 3.3v stby, 3.3v power, 1.8v power and no short on them
but the ps5 is dead again : 1 beep, near 10 seconds with power lines and then off, no blue light ...
i don't see any projection of liquid metal on pcb.
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Hello everyone hope all doing well!
I have this PSU (GPS450-AA delta oem) around for like 4-5 years and I had it recapped early 2020 or 2021 with mostly UCC KY and Nichicon PW's. The bulk was and still is fine, the original Ltec's were bloated and empty. The previous issue was some major coil whine noise and at times random shutdowns when going idle. Today it started tripping the mains breaker and I think I have dead APFC mosfets (20N60C3). Right now upon checking I have the Q1 and Q3 FETs dead so far and I guess those are responsible for the PFC circuit. The only thing I care is If there... -
Hi guys!
I searched for the term "dead short" in the forum but no specific thread came up however if I'm just blind and couldn't see the thread talking about this please forward me to that direction.
So my problem is I don't know how to find the source of a dead shorted voltage rail. Dead short = ~0 ohm resistance.
I have two VGAs (HD 4850 and HD 4870), both dead shorted to ground on the memory rail. I have the boardview file for the 4870 and the memory rail consists around ~7892346 capacitors...
I have a bench PSU and if I try to inject voltage the voltage... -
Hello, today I'm working on this lovely MSI Raider GE75 gaming laptop which I bought to flip. Unfortunately, I believe the CPU is toast but I wanted a second opinion before I chucked it into my spare parts bin. I will not have most tools with me today as I'm away from my workbench but I have the basics (a good multimeter, a horrible iron, a solid screwdriver, and my trusty thermal cam). I do not have the original 230w charger, but I have a Dell 180w which was sold with the device and reportedly "worked fine for them".
Specs: I7-10750H, RTX 2060, 32GB RAM (unknown manufacturer)...
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