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splaz replied to Benq FP767 PS caps

in Troubleshooting Computer Displays

05-27-2008, 10:43 AM
Re: Benq FP767 PS caps

Success.

Monitor is now working fine. I replaced two Elite brand I found that had vents, 470uF/16v off the top of my head with 470uF/35V Panasonic FM. There were smaller ones all over the place but didn't seem worth the effort to go all out.

I'd have some recap pics but the camera's battery is flat...

Oh and thanks again Krankshaft, you're quite the source of information.

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Last edited by splaz; 05-27-2008, 10:46 AM.
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splaz started a topic Benq FP767 PS caps

in Troubleshooting Computer Displays

05-27-2008, 09:15 AM
Benq FP767 PS caps

The monitor had started to turn off every now and then for no reason, I actually thought at the time maybe it was video card related as I'd mucked around with drivers for it only recently.

Then the screen though would spend the majority of the time off and would only every now and then turn on... until over the last few days it wouldn't turn on at all... maybe a bit of blinking from the led and that's about it.

Opened her up and took out the power supply board, 2 bulged caps.

The brown one is a 1000uF/35v Elite.

Black...

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splaz replied to Amplifier hum

in General Capacitor Questions & Issues

05-27-2008, 08:58 AM
Re: Amplifier hum

Thanks very much, just need to wait on parts from overseas now.

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splaz replied to Amplifier hum

in General Capacitor Questions & Issues

05-01-2008, 03:49 AM
Re: Amplifier hum

Yep that looks like the case, 12v DC on the speaker posts.

Good thing I tested it with cheap speakers.

It's an integrated amp, there are no discrete output transistors, I guess the IC is at fault ?...

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splaz started a topic Amplifier hum

in General Capacitor Questions & Issues

04-30-2008, 04:10 AM
Amplifier hum

Hey. I have an amplifier that has a hum problem.

With the amp on whenever the speakers are connected it pops and they emit a low frequency hum, regardless of what input or volume setting. You can't hear anything else.

I've heard the power supply can often be the cause for this, either filter caps or rectifier. The main filter caps are Nippon Chemicon but are probably getting on, the amp I'd guess would be late 70s early 80s maybe.

Otherwise grounding ?

Can anyone shed any light, like what to check for ?

I've got a beginner...

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splaz replied to Unknown Capacitor Brands

in General Capacitor Questions & Issues

02-14-2007, 06:55 AM
Re: Unknown Capacitor Brands

Well they work fine as far as I know. Just was considering it might just be better in the long run to use something a bit more reliable and better quality, as I can't even find anything at all on that brand.

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splaz replied to Unknown Capacitor Brands

in General Capacitor Questions & Issues

02-14-2007, 04:49 AM
Re: Unknown Capacitor Brands

Well this isn't in anything quite as high stress as in a motherboard or PSU but a linear power supply I have to build in kit form for a course has "Sun" axial filter caps.

Anyone heard of them ?

Thinking of replacing them with BC ones.

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splaz replied to Unknown Capacitor Brands

in General Capacitor Questions & Issues

02-12-2007, 11:33 AM
Re: Unknown Capacitor Brands

Never mind, taking it accross to PM as I just checked the date.

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Last edited by splaz; 02-12-2007, 11:37 AM. Reason: Taking it to PM
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splaz replied to Why no Elna Cap for motherboard ?

in General Capacitor Questions & Issues

02-12-2007, 01:08 AM
Re: Why no Elna Cap for motherboard ?

^ That makes sense. An Asus board I returned for repair was recapped with FLs. Couldn't find specs on them but I thought they were FC/FM at first as they look very similar.

Elnas are actually pretty cheap, their RFS Silmic II series is available at digikey. That is part of their audio line, cheaper than same value FC.

THe RFS were 11c each, FC 14c at the 10 price break for both.

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splaz replied to I !#!$$$% hate Radioshack! [Rant]

in General Computer & Tech Discussion

09-01-2006, 01:58 AM
Re: I !#!$$$% hate Radioshack! [Rant]

Like has been said the problem is that there are big chains that sell for cheaper.

Like my mate's dad has an electronics and computer repairs and sales business, basically now he'll never get CRT TVs in for repair because people wouldn't consider paying him to fix it when they can buy a brand new one for a little bit more. Same goes for VCRs and DVD players.

I've got a pretty good setup where I am though. It's impossible to get exotic components but I have 4 electronics stores that are easily accessible to me. Probably...

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Last edited by splaz; 09-01-2006, 02:00 AM.
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splaz replied to Asus P5AD2 Premium - Bulging OSTs

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

08-31-2006, 01:32 AM
Re: Asus P5AD2 Premium - Bulging OSTs

Well I got the board back from Asus.

I've been sent my board back with replacement caps around the CPU socket.

Almost died of a heart attack when I saw what they were replaced with.

Pansonic FCs !

Clearly the repair centre knows what they're doing. Shame they don't come from the factory like that.

I'm still annoyed at having to pay for it but the cost of getting good caps and then paying for the replacement would have been a lot more. I would have been furious if they...

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splaz replied to Asus P5AD2 Premium - Bulging OSTs

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

08-01-2006, 10:34 AM
Re: Asus P5AD2 Premium - Bulging OSTs

Well I'm getting through documenting all the caps and their positions.

The deal from Asus is they'll repair it but for a fee. $33AU...

At the moment I'm inclined to pay that. If it was much more I wouldn't bother.

As I said, myself or my mate's dad's repair business could do it. However the cost of caps alone would be that, let alone the possible problems. Especially given how hard it would be to get replacement caps due to the size...

I put on the stock heatsink to have a look and...

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splaz replied to Asus P5AD2 Premium - Bulging OSTs

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

07-30-2006, 02:20 AM
Re: Asus P5AD2 Premium - Bulging OSTs

Yeah but cheap dick smith irons get a lot hotter. I had a 25W that got insanely hot.

Because this is temp regualated, although I have turned it up a bit, it won't get as hot as one of those cheap irons.

It does have a ceramic heater so it heats up quickly but still I have had trouble with big ground planes in the past.

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splaz replied to Asus P5AD2 Premium - Bulging OSTs

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

07-29-2006, 11:10 AM
Re: Asus P5AD2 Premium - Bulging OSTs

I wouldn't have thought the heat from caps alone could cause that. They don't even get warm on their own in small circuits I've built in the past. Of course a computer could put a cap under more strain...

As I said I would have considered the CPU to be the greatest source of heat, although it is a good point that the stock heatsink provides cooling to surrounding areas.

I'd imagine that heatsink near them may be mosfets, so that could have contributed.

Still ultimately the caps are rated at 105, they're...

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Last edited by splaz; 07-29-2006, 11:14 AM.
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splaz replied to Asus P5AD2 Premium - Bulging OSTs

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

07-28-2006, 10:14 PM
Re: Asus P5AD2 Premium - Bulging OSTs

True but I would thought that a waterblock would cool the CPU far better so there would be less heat in surrounding areas anyway.

That is a point though, there still would be heat radiated to other components. As I said though I thought there would be far less given how much better cooled the CPU itself is.

Still doesn't justify their failure even if it does get hotter. They are rated at 105C so I can't imagine it got anywhere near that....

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splaz replied to Asus P5AD2 Premium - Bulging OSTs

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

07-28-2006, 08:22 PM
Re: Asus P5AD2 Premium - Bulging OSTs

PSU was a PC Power and Cooling and the CPU had a waterblock on it.

Don't think it was that.

Well I noticed OSTs were listed here as being bad and as Topcat just said it's quite common. Plus they don't look all that good quality.

As for a recap. As I said hopefully I can get it under warranty. Even if I do though I'd imagine they'd just put new cheapies on there or give me a replacement with cheap caps.

So even if it is RMAed, I'll definitely recap it somewhere down...

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splaz started a topic Asus P5AD2 Premium - Bulging OSTs

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

07-28-2006, 09:40 AM
Asus P5AD2 Premium - Bulging OSTs

Well I'm apalled at Asus. You pay a 'premium' for this board and you get cheap caps.

What makes it worse is I bought it used and had it shipped to me. I'm a litle peeved with the buyer. Should have been checked really but I did honestly miss it when I skimmed over it at first. Plus someone that doesnt know of this problem and also given that it is stable, the seller ran some stability benchies on it, why look for a cause with no symptoms ?

Asus' fault too ultimately.

Given it's age I'm certain I can have it repaired under warranty. Just thought it may...

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Last edited by splaz; 07-28-2006, 09:43 AM.