Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

[Boregy]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

I replaced most of the caps, but I hear a clicking sound when I try turn it on and the screen does not power on. Should I just replace the power supply board?

[Boregy]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Did you look at post #103?

yes, but kosh doesn't say that he ordered those specific capacitors.

Also, the FM Panasonic 2200uf 10v is backordered, would the FR Panasoncic (P14382-ND) be an acceptable replacement?

[jetadm123]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Kosh, I seem to have the same capacitor set as you, would you mind posting the exact parts your ordered from your invoice. I want to make sure I order capacitors with the proper dimensions.

Thank you.

Did you look at post #103?

[Boregy]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

The caps on my board are

1 2200uF 10V
2 680uF 35V
1 1500uF 16V
2 1000uF 25V
1 100uF 25V

Okay I put the new caps in and plugged it all back together and the monitor works again. Thanks for all the help guys.

Kosh, I seem to have the same capacitor set as you, would you mind posting the exact parts your ordered from your invoice. I want to make sure I order capacitors with the proper dimensions.

Thank you.

[Minathevi]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Upon further research, if your problem with your Westinghouse occurs ONLY on your HDMI input, you probably have HDCP handshake issues. Apparently these particular LCDs are notorious for the problem. I have 2 of these monitors and only one of them actually had bad capacitors. The other has HDCP handshake issues because when using the VGA input, I see no flicker whatsoever. This is unfortunately a software issue and it might not be able to be fixed by component replacement.

The only way that I have found to alleviate the problem is when it occurs, just unplug your HDMI connector from your monitor and plug it back in. It doesn't always work, but it does work temporarily until you turn off your monitor or PC.

[Nicks84]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

I have a 22: lcd from Westing house. We have the same problem. I posted a video on Youtube.

http://www.youtube.com/watch?v=KQ_Q4mf2QdQ

After lots of searching around (and time), I find it is very likely bad caps on the Power supply.

It was exhibiting the same symptoms as yours, but eventually died and now will not power on (this is not shown in the video). It was hit and miss. Sometimes it woudl work and sometimes not.

Now when I hit power, it tries to turn on , but only flickers on for a second, then goes black again. It now makes a whining noise when I plug it up. I cannot tell exactly where the noise is coming from though, even though I took it apart and listened. But I have narrowed down the area of noise. I am currently in the process of trying to replace the caps. Hopefully it works, though, something tells me because it did work, but then recently stopped, I have yet another problem. I guess we will see.

[pedro]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Hey guys. I want to thank you for all the help on this thread. I followed along since I had a Westinghouse LM2410NM acting up.
(snip cap list)

My install went great and it was working all week. Today it just began to act up again. Basically it runs fine, then the screen goes black for about 2 seconds then it comes back on. Happens about every 15 minutes. Before repair that interval was getting shorter the longer I had it running. Heat issue?

I doubt it. I can't envisage a thermal recovering in a couple of seconds off-load, given the 15 minutes it takes (a) to warm up to that point, and (b) after the "blink".

None of my caps appeared damaged before the repair, but after reading that they still could be a problem I replaced them anyway. I didn't replace the very large cap since they rarely go bad, so maybe thats worth swapping?

Doesn't sound like a candidate either, but keep that in mind if nothing else identifies the cause. Check voltages on the PSU board, especially the rail that feeds the inverter section. If that is stable through the blinks, then I'd be suspecting a bad joint in the inverter protection circuitry. If that 12/18/24v/whatever rail wobbles, you are back to looking at the switchmode PSU itself.

[alexanna]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

My install went great and it was working all week. Today it just began to act up again. Basically it runs fine, then the screen goes black for about 2 seconds then it comes back on. Happens about every 15 minutes. Before repair that interval was getting shorter the longer I had it running. Heat issue?

Thanks!

Recheck the soldering of all the capacitors you replaced.
Really sounds as if for some reason you may be losing your secondary voltages briefly. This can happen really fast if you blink you might miss it.
It may not be fun but you're going to have to see what voltages you are losing. If all your solder joints look good on the capacitors you replaced, I would suggest noting what the voltages are on the connector from the power supply to the logic board when the monitor is working, and see if any of the voltages change when the monitors back lights shut off.

[kiwimonk]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Hey guys. I want to thank you for all the help on this thread. I followed along since I had a Westinghouse LM2410NM acting up.
I seem to have the version 2 of the power supply. Here is my order.
P12415-ND CAP 470UF 35V ELECT FM RADIAL x 2
P12405-ND CAP 1000UF 35V ELECT FM RADIAL x 1
P12389-ND CAP 470UF 25V ELECT FM RADIAL x 1
P12387-ND CAP 330UF 25V ELECT FM RADIAL x 1
P12924-ND CAP ELECT 100UF 25V FM RADIAL x 3
P12927-ND CAP ELECT 22UF 50V FM RADIAL x 2
P10294-ND CAP 100UF 35V ELECT FC RADIAL x 4

My install went great and it was working all week. Today it just began to act up again. Basically it runs fine, then the screen goes black for about 2 seconds then it comes back on. Happens about every 15 minutes. Before repair that interval was getting shorter the longer I had it running. Heat issue?

None of my caps appeared damaged before the repair, but after reading that they still could be a problem I replaced them anyway. I didn't replace the very large cap since they rarely go bad, so maybe thats worth swapping?
Any ideas on what else could be causing the problem?

Thanks!

[kosh]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Okay I put the new caps in and plugged it all back together and the monitor works again. Thanks for all the help guys.

[PlainBill]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

The caps on my board are

1 2200uF 10V
2 680uF 35V
1 1500uF 16V
2 1000uF 25V
1 100uF 25V

This kit matches that.

http://lcdalternatives.auctivacommer...-P1660216.aspx

Would that be okay to get or should I look for something else?

How much is your time worth? Are you in the USA? It took about 10 minutes to come up with these items from Digikey. Add about $3 for shipping by USPS First Class Mail.
1 1 P14382-ND CAP ELECT 2200UF 10V FR RADIAL 0.94000 $0.94
2 2 P12417-ND CAP 680UF 35V ELECT FM RADIAL 0.85000 $1.70
3 1 P12368-ND CAP 1500UF 16V ELECT FM RADIAL 0.85000 $0.85
4 2 P14424-ND CAP ELECT 1000UF 25V FR RADIAL 0.91000 $1.82
5 1 P14413-ND CAP ELECT 100UF 25V FR RADIAL 0.33000 $0.33
Subtotal $5.64

PlainBill

[kosh]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

The caps on my board are

1 2200uF 10V
2 680uF 35V
1 1500uF 16V
2 1000uF 25V
1 100uF 25V

This kit matches that.

http://lcdalternatives.auctivacommer...-P1660216.aspx

Would that be okay to get or should I look for something else?

[PlainBill]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Oh I got the monitor open just fine and I can solder things.



It is one of a set of 4 monitors so I can use the other 3 for now I would just prefer not to get a new one if I don't have to.

It is hard to find a good PVA panel and I really like them for programming work.
When I did some experiements with TN panels I found that did not work very well with strange color shifting from top to bottom and side to side that I found distrating.

IPS I have not liked as much for text work as PVA panels.

[/QUOTE]
There you have the answer. Just remember to use name brand low ESR caps. I prefer Panasonic FM, FR, or FC series. Nichicon United Chemicon, and Rubycon have equivalent series parts.

PlainBill

[kosh]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

First, I would judge there is a 75% chance that replacing the caps will repair the monitor. A 'slight bulge' indicates the cap has failed. Caps can fail without any visible signs - some manufacturers are skilled on making that happen.

As far as repair vs replace, there are several factors to consider.

1. How are your soldering skills? If you never soldered, this is not the easiest way to learn. Still, it's not a great stretch - it's not like we are talking about replacing a 400 pin IC. (Since you did not report problems getting the monitor open, I assume your mechanical skills are up to the task.)

Oh I got the monitor open just fine and I can solder things.

2. How badly do you need the monitor? You could get a replacement today; you won't be able to get the caps until Wednesday.

It is one of a set of 4 monitors so I can use the other 3 for now I would just prefer not to get a new one if I don't have to.

It is hard to find a good PVA panel and I really like them for programming work.
When I did some experiements with TN panels I found that did not work very well with strange color shifting from top to bottom and side to side that I found distrating.

IPS I have not liked as much for text work as PVA panels.
[/QUOTE]

[PlainBill]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

I have the same monitor and it has just failed also. Yesterday it started to make a high pitched whine so I turned it off. By high pitched whine I mean it had such a high pitch that nobody else around could even hear it but it went off when I turned the power off so it clearly was coming from the monitor and that is where I heard it from. When I tried to turn it on today it would not turn on at all. The power light flickered very briefly on and that is it.

Is it likely that the caps have gone bad on the board also? I opened it up and can see no sign of burning anywhere but one cap is very slightly bulged at the top.

Is it worth it to try and repair it or just replace it? What are the odds that if it is the caps that something else is broken now as a result even though I can see no signs of damage anywhere.

Considering that it lasted out of the warranty I can't get it repaired that way. It also looks like most repair places charge enough that I would be better off getting another monitor then using them.

First, I would judge there is a 75% chance that replacing the caps will repair the monitor. A 'slight bulge' indicates the cap has failed. Caps can fail without any visible signs - some manufacturers are skilled on making that happen.

As far as repair vs replace, there are several factors to consider.

1. How are your soldering skills? If you never soldered, this is not the easiest way to learn. Still, it's not a great stretch - it's not like we are talking about replacing a 400 pin IC. (Since you did not report problems getting the monitor open, I assume your mechanical skills are up to the task.)

2. How badly do you need the monitor? You could get a replacement today; you won't be able to get the caps until Wednesday.

3. What is your financial situation? An equivalent monitor will run $250 - $300 while a full set of caps will run under $15 from Digikey (USPS First Class shipping).

4. How badly do you want a new monitor? Balance the points of bragging 'I fixed it myself' vs 'I bought a new 25" monitor Saturday'.

In the event you decide to replace the monitor, let me know. I'd gladly pay shipping (assuming you are in the USA). A guy can't have too many 24" monitors on hand.

PlainBill

[kosh]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

I have the same monitor and it has just failed also. Yesterday it started to make a high pitched whine so I turned it off. By high pitched whine I mean it had such a high pitch that nobody else around could even hear it but it went off when I turned the power off so it clearly was coming from the monitor and that is where I heard it from. When I tried to turn it on today it would not turn on at all. The power light flickered very briefly on and that is it.

Is it likely that the caps have gone bad on the board also? I opened it up and can see no sign of burning anywhere but one cap is very slightly bulged at the top.

Is it worth it to try and repair it or just replace it? What are the odds that if it is the caps that something else is broken now as a result even though I can see no signs of damage anywhere.

Considering that it lasted out of the warranty I can't get it repaired that way. It also looks like most repair places charge enough that I would be better off getting another monitor then using them.

[retiredcaps]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Assuming the height and diameter work for the replace FC with FR.

100uF 25V use Panasonic FR P14413-ND
22uF 50V use Panasonic FR P14452-ND
1000uF 35V, use Panasonic FM P12405-ND

[jjpjimmy]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Hi I've replaced the 4 capacitors on the Inverter and there has been a little progress in that the monitor shows at least some lines of the color (BIOS blue), from nothing at all. I'm hearing a whine/high pitched noise from the Power Supply; and I'm going to purchase replacement capacitors for the power supply (I've got the version 2 listed above by ben3843100) and I'd like to run final checks for these...

35v1000uF
(x3) 25v100uF
25v330uF
25v470uF
(x2) 35v470uF
(x2) 50v22uF
420v120uF

[ben3843100]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

I need to buy a soldering iron (never soldered before).

Can someone recommend which I should choose between these 2:

-links removed-

or any other recommendation.

Thank you.

If you have a Radio Shack near you (or online), they have a nice 45 watt de-soldering iron for only $10.99. I'm no pro, but I picked one up and it was very easy to remove the caps on my LCD power supply board with the special tip and suction bulb. I haven't tried the following, but you may be able to swap the tip for a standard soldering tip available from Radio Shack and use it as a regular soldering iron as well.

http://www.radioshack.com/product/in...ductId=2062731

-Ben

[retiredcaps]

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

I need to buy a soldering iron (never soldered before).

If you are only going to solder once or twice, then I would look on ebay for the cheapest 40W soldering iron. I use this method myself and pay about $2.99 USD. I have used this iron to repair about 14+ monitors.

The irons on ebay are probably come from the same factory as DealExtreme.

This website has an excellent guide on soldering at FAQ section

https://www.badcaps.net/forum/showthread.php?t=485

The video solder video is by Curious Inventor at

http://www.youtube.com/watch?v=I_NU2ruzyc4