Re: Hitachi LE55A6R9A - No backlight
Of course, that's what I'm studying up to do.
I'm considering buying the little dedicated ShopJimmy gizmo to detach the single LED, and maybe some LEDs and diffusion covers so I can do this again if I have to.
Definitely. I keep forgetting to do that, next time I've got a little spare time I'll unhook a car battery and check it....
PorkfriedPanda
Member
Last Activity: 12-21-2016, 02:27 PM
Joined: 11-25-2016
Location: Ohio
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Re: Hitachi LE55A6R9A - No backlight
Bought the LED tester, confirmed that bottom LED strip works, top LED strip doesn't.
Exploring options from here, watching vids, etc.
Thanks for all the info guys
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Re: Lg 42LE4500 losing backlights
They seem reasonably welcoming to me. They're not necessarily sunshine and daffodils but shit, it's a forum about fixing electronics so I didn't really expect that....Leave a comment:
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Re: Starting point?
Some of it is really basic but I'm reading it all anyhow. Good stuff, filling me in on some basic things I never really understood!
And yes, even if we're not super young, there's so so much time to learn if you're truly willing.Leave a comment:
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Re: Starting point?
Thanks
I'll definitely be reading this!Leave a comment:
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Starting point?
I've never been shy about repairing my own stuff. Asking people I know for advice, YouTubing it, etc. I've been covered in oil, shocked, bloodied my knuckles, set a generator on fire, etc. It's always been worth it though, both for the pride of fixing your own stuff and learning.
That said, with electronics in particular, I would like a firmer grounding. No pun intended. I know a thing or two, but it's random first-hand experience and rather disconnected knowledge.
I've lurked on here for a while and fixed my own odds and ends since I was a kid. I've soldered, I get the...Last edited by PorkfriedPanda; 11-26-2016, 06:27 AM. -
Re: Hitachi LE55A6R9A - No backlight
I'll make the orders soon, but I may have to wait a few weeks with the holidays and all.
In the meantime, a question. The LED tester can be used to test the strips prior to opening the chassis and messing with them, yes?
I'm not super hung up on saving this TV, more interested in practice, so I'm not opposed to opening it up. Still, if this particular unit can be salvaged without risking damage that's a plus. And I can, of course, practice that on a different TV in the future.Last edited by PorkfriedPanda; 11-26-2016, 05:15 AM.Leave a comment:
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Re: Hitachi LE55A6R9A - No backlight
Fair enough. What's the cost for the LED tester, if it's not outrageous I wouldn't mind picking it up. Probably won't be the last time I try to fix a TV, honestly.
This seem right? [url]https://www.amazon.com/0-310V-Output-Multipurpose-Backlight-Application/dp/B01A1479ZS[/url]
EDIT: Can anyone recommend a not-outrageously-expensive but adequate multi-meter for this kind of work?Re: Hitachi LE55A6R9A - No backlight...r, if it's not...Last edited by PorkfriedPanda; 11-25-2016, 09:08 PM.Leave a comment:
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Re: Hitachi LE55A6R9A - No backlight
You said 12v right?
Is a car battery a safe test?...Leave a comment:
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Re: Hitachi LE55A6R9A - No backlight
Gotcha, I'll try that now!
EDIT: Okay, tried it. Powered it off and on and even turned it off and on at the wall once with the probes in place while staring at the meter. Nothing across there.
EDIT2: I'll get you that larger view, by the way. Sorry I think I missed an edit, and I read that about it being isolated from the chassis ground as well!
EDIT3: Actually, copied over from budm's ShopJimmy link!
...Last edited by PorkfriedPanda; 11-25-2016, 09:01 PM.Leave a comment:
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Re: Hitachi LE55A6R9A - No backlight
TV is on with the light blue. Pressing metal to metal in the socket, set to DC voltage 200, with the probes set correctly and measuring with the probes precisely where you show...
I get nothing on the meter. Bad power board after all?...Last edited by PorkfriedPanda; 11-25-2016, 08:40 PM.Leave a comment:
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Re: Hitachi LE55A6R9A - No backlight
Makes sense, that does seem really really high.
Could the meter just be broken?...Leave a comment:
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Re: Hitachi LE55A6R9A - No backlight
This is precisely what I was about to report. As far as I can tell, I'm not getting any voltage in that area.
With it grounded on the case, these were the results. The red marks were reading over 1000 volts, the black marks were reading nothing at all. This is with the TV plugged in and the power button pressed to take it from red light to blue light. Despite the illustration, I was doing this with the wires all plugged in! Just to be clear.
I'm testing the LED leads by jamming the red probe deep into it...Last edited by PorkfriedPanda; 11-25-2016, 08:13 PM.Leave a comment:
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Re: Hitachi LE55A6R9A - No backlight
Okay thank you, I suspected I was doing all kinds of things wrong. Thanks for your patience. I hope I haven't damaged the TV, though it still seems to be basically behaving the same, so fingers crossed. I honestly don't feel torn up about losing a TV I got for free ( and I have plenty of them already at the moment, don't really need this one. ) I just don't want to damage it and miss the opportunity to get it working.
When I was at 200 with the red probe in the correct slot, I wasn't getting what the video was showing....Last edited by PorkfriedPanda; 11-25-2016, 07:57 PM.Leave a comment:
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Re: Hitachi LE55A6R9A - No backlight
Okay update.
The meter is set up like this, just because I want to make sure I'm not being silly.
When I ground it, then press deep in the sockets on the actual lines that lead to the LED I get a really small reading for a split second, then nothing. At the "top" of both nearby diodes, at this setting, I get wildly, randomly fluctuating readings. Nothing at all like the video. On the "bottom" leg I get nothing as well.
On the actual points in the 'sockets' I definitely make...Last edited by PorkfriedPanda; 11-25-2016, 07:19 PM.Leave a comment:
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Re: Hitachi LE55A6R9A - No backlight
I took this TV to learn as much as to actually fix it. If it's a write off or not really "worth it" that's not such a big issue.
I am... somewhat sure but I will double check.
My multi-meter is kind of cheap. In the video he set it to 600 volts ( Is that the right unit? Straight volts, not a x10 1/10 or whatever) My meter says 200, then 1000. I was using 200. Direct current of course. Could that cause a false non-reading?
I was getting readings other places on the power supply board, but not (...Last edited by PorkfriedPanda; 11-25-2016, 06:43 PM.Leave a comment:
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Hitachi LE55A6R9A - No backlight
Hello guys, my name is Christopher and, after watching an excellent YouTube video by MrReeceyBurger123, I decided to come and post here for help with my problem!
The video in question: [url]https://www.youtube.com/watch?v=0uBhca7zyXI&t=604s[/url]
I'm not nearly as knowledgeable with hardware as many of you here, but I will do my best to avoid asking outright stupid questions and I won't demand spoon feeding.
However, I am at a point in this repair where I think it's best if I ask those with more experience than myself.
So this 55" Hitachi...Last edited by PorkfriedPanda; 11-25-2016, 06:08 PM. -
Re: New Members - please post your introductions here
Hello, Porkfried here!
I'm really new to all of this, learning as I go. I've never been shy about Googling my way through and repairing things, and I thought this might be a good source of information and a chance to learn.
I came here from a really great YouTube video about a problem I am trying to solve.Leave a comment:
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