Recent content by mitchW

iMac G5 may work "fine" with multiple blown (bulging) capacitors, or might fail to POST or exhibit problems with just one defective capacitor. My iMac G5 (17-inch, 1st version) has 2 bulging capacitors on the mainboard and it works fine. I reccaped the PSU (also very important on those!) about...

That's true. But I would really like to see how bad the original caps were ESR wise. If that was a eMac (the one with known capacitor disease) or iMac G5, then a full recap (including the PSU) would be totally in order. I had iMac G5s that didn't boot into OS (just froze) that had just one...

My condolences. Btw, why did you attempt to do a full recap anyways? Were there any problems that looked like there were bad capacitors? I deal with 70 year old radios and TVs sometimes, and I almost always replace just one cap and then test. I only do a full recap on few sets that I had...

No replies? Is vinegar syndrome so rare after all? I found another two laptops with vinegar syndrome, one of my favorite 486 laptops ever made - Compaq Contura Aero 425. And one much newer, a Compaq Armada E500, from 2000! That one was still fine just 6 months ago. I guess the defect isn't that...

Here, some photos:

My PowerBook 160 sadly developed a vinegar syndrome after being stored for bit more than 2 years. Other similar aged PowerBooks in my collection are still fine, also being stored for same amount. I opened it and found out that the panel is Sharp LM64P58. I saw few videos about replacing the...

Any info on original caps? Were they still in spec? I don't think they leak I know they are pushing 25 year mark, but I have some apple stuff pushing 40 year mark and still going strong with original caps (except RIFAs).

Btw are there any reports of leaking caps in those LCDs?

I opted actually actually for Hybrid Polymers, not the standard Polymers. They are somewhere in between of a Polymer and normal Aluminum Electrolytics. A bit of a new technology. I don't think they will leak anytime soon also :) There's a good read of comparing these three technologies...

Hey, yeah, go ahead. You can use the photos and the cap list :) I am also planning of opening a dedicated new thread and presenting the restoration there. Btw, I ordered Aluminum Hybrid Polymer Capacitors, as they are more like standard electrolytics, but have excellent electrical properties...

NiCD and NiMH batteries can last decades (actually surpassing Lithium Ion), but only if their seals aren't broken, so the air can't get into and oxidise them. But as we can see, most of those batteries leak after all that time as the seals get breached, and the air enters, and the electrolyte...

Thanks! Well I got the 270c yesterday and is uses bit different array of caps: Here is the list: Logic board: 4x 35V 100uF 10x10mm footprint 1x 35V 47uF 8x8mm footprint 1x 25V 100uF 8x8mm footprint All those must be 10-11 mm tall or less 1x 25V 33uF 6x6mm footprint, 6mm tall Inverter: 1x...

Hey, anyone has a list of all PB Duo 270c capacitors? Does the LCD on it also needs a recap? Thanks, M.

My hands on experience with Apple laptops: For the polymer caps, on the MacBooks that run 12.6V PPBUS_G3H (main power rail), they used all 16V caps. And they hold very well, no instances of being shorted or anyhow degraded over years. And those machines also run very hot, something that isn't a...

There is an issue. Tantalum caps have much greater voltage derating. In simple words, tantalum capacitor that "sees" 12V needs to be more than 16V rated, that one should be 25V. Other types of cap technology don't have this problem. Apple used same rated capacitors (16V 47uF) on multiple voltage...