Re: Replaced 2 buldging caps on a dead monitor, now flickering?
Problem solved!
Tested all the other caps and found no problems, so resoldered them, and removed some old adhesive glue crap. And now the monitor works without problems!
JoeyJoe
Senior Member
Last Activity: 04-03-2014, 03:58 AM
Joined: 09-10-2012
Location: London
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Re: Replaced 2 buldging caps on a dead monitor, now flickering?
I tested a capacitor that was a 35v 1000uf and it would only get a reading if I reversed the polarity?Leave a comment:
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Replaced 2 buldging caps on a dead monitor, now flickering?
The monitor is a DGM 24" monitor.
It were completely dead, so I took a look inside and replaced 2 bulging caps (16v 1000uf). I replaced them with the same rating and Panasonic low ESR caps.
It works and turns on, but now there is a flickering across the screen. The picture is there from the VGA port and it looks clear if it wasn't for the lines.
The whole picture jumps up and down slightly too.
I checked the cables etc and everything is in place.
Have I missed some caps? -
Re: I just saw a computer do the craziest thing...
It had already scanned the local network for printers by the looks of it. Then either it already had the driver, or it downloaded from the net itself.
I've seen it before.Leave a comment:
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Re: My Arduino Capacitance meter!
Here is the code that calculates the Farads.
[CODE] digitalWrite(chargePin, HIGH); // set chargePin HIGH and capacitor charging
startTime = millis();
while(analogRead(analogPin) < 648){ // 647 is 63.2% of 1023, which corresponds to full-scale voltage
}
elapsedTime= millis() - startTime;
// convert milliseconds to seconds ( 10^-3 ) and Farads to microFarads ( 10^6 ), net 10^3 (1000)
microFarads = ((float)elapsedTime / resistorValue) * 1000; [...Leave a comment:
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Re: My Arduino Capacitance meter!
I did also once make a fully working IRC client out of it. Complete with PS2 keyboard, 20x4 LCD, and commands to change rooms etc....Leave a comment:
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Re: My Arduino Capacitance meter!
You can use an Ethernet module to use it to send emails too. I have one of those as well.
You can also write some software on the PC that will listen to communications from the Arduino on the serial port, and use that to send the emails.
You can make an ESR meter, I think there is someone on these forums that has been working on one recently. Doesn't look too hard but its the code that is the hard part.
If your from the UK, I had plenty of LCD screens (Used to be eBay seller), as well as some *cheap* Ardui...Leave a comment:
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My Arduino Capacitance meter!
I made it from the help of some online schematics and code.
Simple design really, looks messy from all the LCD wiring.
As you can see from the image, 1000uf cap reading at 994uf, fluctuates around 994 - 1000uf on the reading, so pretty accurate. Depending on how accurate the resistor in the charge circuit is.
Using this with blow capacitors, the reading is either 50% or less than the rated farads, or doesn't get a reading at all. Used it today and found a couple of bad caps with it that weren't blown.
Thinking of a way to have a green/red light... -
Re: ic question
I hate these laptops. Chances are if it has a Nvidea graphics chip, it will die within 18 months.
Also if you are from the UK, I can send you a motherboard for one of these. Probably not working, but you could salvage the chip off of it.
JoeLast edited by JoeyJoe; 10-09-2013, 03:45 PM.Leave a comment:
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Re: Blown caps reverse polarity?
Ignore that, turned out it works both ways
Leave a comment:
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Blown caps reverse polarity?
I build a capacitance meter today that has been working well. It gives the farad reading on a LCD, which is pretty accurate.
I tested some blown caps on this thing, but it only gives a reading when the negative is connected to the positive and vice versa.
Why does this happen? -
[LED] Philips E-line 247E3LPH - No input signal?
Hi,
This monitor is brand new, still in the plastic wrap.
Has 2x HDMI and 1x VGA input, but neither gets an input signal.
I have not yet opened it up.
Where should I start?
Thanks!... -
Re: Any tips for my first recapping? (iMac G5)
Personally I use a 30w iron with a fine pointed head, a solder pump and some thin solder. It all comes down to personal preference but I find it easier to use. I also found out the hard way to always use decent capacitors. I will always use Panasonic from now on.Leave a comment:
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Re: How to tell if capacitors are genuine?
Final question, These caps were 50p each, I have some other cheapo ones, is it any harm to use both in monitors?
I have 2 rows of 3 25v 1000uf caps, would the monitor be fine with 2 of the caps on each row being Panasonic, and the other to be the cheapo ones? Just to save on a bit?Leave a comment:
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Re: How to tell if capacitors are genuine?
Thank you,
From what you've told me, I'm 95% sure these are genuine. I have some others from a big bag of mixed caps, I can see some are Panasonic ones and they are identical to them.
Thanks!Leave a comment:
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Re: How to tell if capacitors are genuine?
They have a M in a square box, followed by CE CM. You can see it on one of them in the picture: [url]http://imgur.com/fb4eQKj[/url].
The [M] is in gold, and there is a red number printed on the side.Re: How to tell if capacitors are ge...d on the side.Re: How to tell if capacitors are genuine?
TheyLast edited by JoeyJoe; 09-28-2013, 07:12 AM.Leave a comment:
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Re: Trouble sourcing an inverter. - EEL-22T
I'm sure its the problem, I did pull de-solder it and run some ohm tests on it that suggested it were broken.
It's one of the older monitors I have, I don't mind turning it into a single primary, If I knew exactly which pins to bridge
.
Thank you so much for spending your time to have a look for me.Leave a comment:
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Re: Is my Monitor Shot? Smells like an Electrical Fire
They only have to make it work for a year, that's all that they care about....Leave a comment:
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How to tell if capacitors are genuine?
Hi,
I bought some cheap "Suntan" caps on eBay, but after being told they are shite, I bought some Panasonic ones instead. (£10 for 20).
They are 25v 1000uf, gold and black, but doesn't say "Panasonic" on them at all. Just the numbers: 902QG
Shouldn't genuine ones at least have "Panasonic" wrote on them?
Joe
Here is a picture: [url]http://imgur.com/fb4eQKj[/url]https://Hi,<br /> <br /> I bought so... ones instead.Last edited by JoeyJoe; 09-28-2013, 06:50 AM. -
Re: Issue with HP W2338H Monitor
Do you hear any buzzing sounds coming from the LCD panel while it is on for the 2 seconds? If so, then defiantly some arching going on with the tubes.Leave a comment:
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