Re: Vizio E461-A1 (lightning strike)
Good news!
I ordered the 24NM60N and R2A20113ASP (well, had to get 5x each) from eBay. They arrived a couple days ago and I installed them yesterday. Unfortunately the fuses I ordered hadn't arrived yet. I waited to see if they were going to show up today. They didn't.
So I went to the hardware store and paid the $6.50 for two of the dang things (grrr) so that I'd have something to do today.
Whaddya know, it works! Despite my less than stellar SM work.
As an added bonus, it appears I got very lucky - all...
alecjahn
Dumb enthusiast
Last Activity: 07-15-2017, 11:49 AM
Joined: 02-22-2012
Location: Wichita, Kansas
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Last edited by alecjahn; 06-25-2016, 03:30 PM. -
Re: Vizio E461-A1 (lightning strike)
Sounds like a plan. Unfortunately, neither DigiKey or Mouser stock that IC. All I can find is one eBay listing from China.
EDIT: Missed your second post. I'll do that as well, thanks for the info. Gotta remove a big shield first, which will be a pain. Everything in plain view looks fine.
I appreciate all of your help, budm. Thanks!Last edited by alecjahn; 06-13-2016, 01:37 PM.Leave a comment:
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Re: Vizio E461-A1 (lightning strike)
That sounds promising.
Took me entirely too long just now trying to find that IC...
whaddya know, it was on the bottom of the board... Dur.
Anyway... unfortunately for me, that whole area of the circuit seems to be all surface mount stuff which puts a damper on easily pulling and checking components.
How might I go about testing the IC? So far, with my meter on beep-beep mode, there's a short (~10ohms) between VCC and GND.
Seems like that could be the fault of ZD9107 as well, so I lifted...Last edited by alecjahn; 06-13-2016, 12:24 PM.Leave a comment:
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Re: Vizio E461-A1 (lightning strike)
Well dang. The part arrived and I installed it. I plugged it in and the fuse didn't blow... for about 4 seconds (previously it'd blow immediately).
So:
-replaced part
-fuse blew, albeit delayed
-replacement part is now shorted just as the original was.
I checked for shorts after I installed the part and before I applied power. So, something else caused the 24NM60N to fail, again, which perhaps prompted the fuse to blow.
hmmmm.
I found what appears to be the schematic...Last edited by alecjahn; 06-13-2016, 11:25 AM.Leave a comment:
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Vizio E461-A1 (lightning strike)
On the bench today (well, technically my bed...) is this 46" Vizio. Fairly recent model (quite thin bezel to note) LCD with LED backlight. Freebie from a friend's grandmother.
We had a week or so of constant thunderstorms here in Kansas and this was a casualty of a lightning strike.
I THINK I have this progressing properly but I just want to make sure I'm not missing anything.
Initial symptom was a completely dead set, naturally. No lights, no smoke, no mirrors.
The mains fuse (5A slo-blow, ceramic) had failed. I popped in a glass 5A slo-blow...Last edited by alecjahn; 06-09-2016, 02:37 PM. -
Re: Dell Precision 380
Little update. I did a lot of digging and came up with some cap combinations that were suitable for temporary/test replacement. However, they're not the quality I would want to use permanently.
I swapped them onto the board and was able to install Windows in full on this machine without a problem. Even tossed a thirsty video card and it seems to be solid (remember, earlier, it would die before the Windows DVD was even finished loading to memory). I'm going to call it a day for now, but this has given me enough of a boost to order proper caps. Which...Leave a comment:
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Re: Dell Precision 380
Yeah. It looks fine... but hard to really see much in it (packed tight). I need to check the pinouts and see if a generic could be swapped-in for testing (but I seem to recall Dell doing some funky stuff at times).
I also put in a wimpy video card and removed the hard drive/CD-Rom altogether, and booted Memtest from a usb drive, just to try the most limited-power setup, but the same results. Figured that might have been a good enough test for now.Last edited by alecjahn; 01-09-2015, 11:33 AM.Leave a comment:
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Dell Precision 380
Hello friends,
Today's project is a Precision 380 motherboard. It's a "newer" machine, at least I'd consider it to be that (even getting on at 8 years old now...) in comparison to the more commonly plagued Precisions.
Quick side note: I have a Precision 390 as well (Core 2 Duo board as opposed to the 380's Pentium D/4 board and 955 chipset) and It had four blown caps right in the center of the board. It would restart *with error beep* (note!) and was absolutely random on whether it would detect any stick of ram in any slot at any given time. Replaced...Last edited by alecjahn; 01-09-2015, 11:20 AM. -
Re: iMac 20" (white) PSU Runs, Then Shuts Down? P/N 614-0363
Though there was no resolution to this thread, I will jump in - I have this same model iMac. Original Intel 20" (iMac4,1). (I will also note that I have no repair solution.)
Same model PSU. I thought I could somewhat predict when the computer would shut off... under load of some sort, but I could load the crap out of the processor (100%) and then try to do some graphics at the same time (high res videos, etc) and it would be rock solid... then I close that and sit on a web page and POW it shuts off...Last edited by alecjahn; 05-13-2014, 05:08 PM.Leave a comment:
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Re: (Generic) CCFL replacement - uneven lighting? - 223BW
Well, I bought the kit off of CCFL Warehouse for that specific model.
And yes, I see now that LED conversions appear to be cheaper, like half the price. I guess I'll know next time......Leave a comment:
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Re: (Generic) CCFL replacement - uneven lighting? - 223BW
Thank you, that's what I was wanting to hear.
Well, I guess I was *wanting* to hear "tweak that sucker, your lines will go away!" but knowing I was right not to touch it is pretty good, too.
I think I'll just live with the lines. I've got a couple other same-size displays that I could use for myself, but I realize selling this one would be difficult, considering it would be hard to break even with the new bulbs and this malady.
Cheers,
-Alec...Leave a comment:
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Re: (Generic) CCFL replacement - uneven lighting? - 223BW
It's hard for me to tell, but it appears they are perfectly vertical. I guess that doesn't sound farfetched (mark in edge of glass light shining perfectly vertical through it), but my first thought was something was wrong with the panel itself, and the lines were literally following vertical blocks of pixels.
Say, there's that tiny little potentiometer on the back of the [T-CON board? Is that what it is called in these small LCDs, too?]
I'd play with it, but turning random pots is scary.
Seems...Leave a comment:
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Re: (Generic) CCFL replacement - uneven lighting? - 223BW
Upon looking inside, it sorta looks like little fractures line the edges of the glass. I could see these causing bright spots/refractions or something. I'm not sure how I would have possibly created these marks, but who knows?Leave a comment:
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(Generic) CCFL replacement - uneven lighting? - 223BW
Ordered a 4-bulb kit (two pairs) from CCFL Warehouse for one of my Samsung 226BW monitors.
(I accidentally put 22[b]3[/b]BW in the title... crud)
Got it installed, now the display works. Long ago, I had two of these that were both inop, and I found that one bulb in each monitor was dead, thus creating the standard 2-seconds problem. I swapped the good bulbs from one monitor and put them in the other, creating one good and fully dead one. That second one is the one that I put new bulbs in.
Anyway, it all looks great... Except the lighting isn't perfectly even. ... -
Re: LG 50PG20 - Y-SUS/Z-SUS problems after PSU repairedS?
Alright. So I have to update.
I continued to fail attempting to repair the board. Even bought one of those "kits" that came with some caps and MOSFETs. No luck.
All the while it had been experiencing typical and obvious Y/Z failure (unplug one, stays on... etc).
Finally found a reasonably priced PSU on eBay. It wasn't the exact board model number. Mine was an EAY39190301, and it seems everyone else's 50PG20 has a EAY41360901 (this is what I bought). I took a chance,...Last edited by alecjahn; 04-04-2014, 03:03 PM.Leave a comment:
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Re: Samsung 2333SW - Image/color-relative glitching
Additionally, the panel board has a small trimpot on it. I measured it from all angles, and then commenced tweaking it with the monitor on. I'm sure someone could tell me what it is for, but anyway it had no effect on the problem (but did alter the brightness/contrast/gamma/something of the picture a fair bit. I didn't play with it for too long and set it back to where it was.Leave a comment:
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Re: Samsung 2333SW - Image/color-relative glitching
New main/logic board arrived. No luck. I should have known it would probably be the panel... Which I will dive into (at least the board) some time.
I have found that if I lowered the brighness and contrast it would behave a little better... I could be imagining things, though. I'm going to see how long that lasts. Also, I noticed that, when watching a test movie, if I change the MagicBright mode to "sports" it would immediately freeze the screen and start the gamma ramp that ends in a white (ish) screen....Last edited by alecjahn; 08-20-2013, 04:56 PM.Leave a comment:
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Re: Samsung 2333SW - Image/color-relative glitching
I've got a new main/logic board on order, I will let you know if that ends up repairing mine (I fully expect it will, and fully realize board replacement is less informative and less fun than component level board repair...). NOTE that there are at least two revisions of this one model - my logic board happens to be one that seems to be more difficult to find. I believe it [again, *mine*] is part number BN81-03454A, though I could not find this marking on my current board. The other board I have seen has two cable connections instead...Last edited by alecjahn; 08-16-2013, 01:51 PM.Leave a comment:
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Samsung 2333SW - Image/color-relative glitching
There was a post about this before, or maybe something similar... but it sounds like it's probably the same issue.
[url]https://www.badcaps.net/forum/showthread.php?t=20849[/url]
It ended in the request to check some voltage regulators. This is where I post my qualitative results to finish that thread. But I can't tonight... but I will continue.
The LCD freaks-out with certain images. When I acquired the display I initially thought, "Oh... hey... this one is totally fine." Then I started to adjust the color/brightness/contrast settings to my liking and noticed... -
Re: Sanyo DP32746 - CCFL testing results - 2 seconds to black
After a DOA inverter board from eBay, I did more testing (why didn't I do this before? I mentioned in the first post that I started doing this and totally flaked-out... I feel like a fool!). The transformer on the "dead" bulb's line was reading infinity on the output coil (if that's the correct term). Well. I swapped the allegedly dead coil with another on the same board and though the overall status didn't change the dark spot moved to that new position of the dead coil. Luckily for me the corresponding mosfet...Last edited by alecjahn; 07-31-2013, 09:35 PM.Leave a comment:
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