I'm so appreciating IBM's thoughtfulness in RTC batteries right now.

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Thinkpad4by3
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I'm so appreciating IBM's thoughtfulness in RTC batteries right now.

#1 Post by Thinkpad4by3 » Sun Oct 29, 2017 7:07 pm

With the exception of the 701C, all IBM's laptops had a nice, easily replaceable RTC battery. I'm working on this Magnavox 286 laptop and it uses a soldered RTC battery in a chip that you have to unsolder all 24 pins. Due note, this laptop for some reason uses screws that are UNSTRIPPABLE!! These screws are beaten to hell and back, and they still back out with no issue what so ever.
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oeuvre
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Re: I'm so appreciating IBM's thoughtfulness in RTC batteries right now.

#2 Post by oeuvre » Sun Oct 29, 2017 7:39 pm

Gah, I hate soldered RTCs... is it one of those Dallas RTC block things?
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Thinkpad4by3
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Re: I'm so appreciating IBM's thoughtfulness in RTC batteries right now.

#3 Post by Thinkpad4by3 » Sun Oct 29, 2017 7:47 pm

oeuvre wrote:
Sun Oct 29, 2017 7:39 pm
Gah, I hate soldered RTCs... is it one of those Dallas RTC block things?
You bet it is a Dallas RTC block. Dealt with them before but this one is not socketed. I bought one NOS about 3 years ago and it is dead again but atleast it is socketed. I will have to mod this one.
Welcome to the jungle, we have FrankenPads
If you want it you're going to bleed, but that is the price to pay
And you're a very rare mobo, very hard to get
You can see the blinky lights, but you won't get them for free.

edik
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Re: I'm so appreciating IBM's thoughtfulness in RTC batteries right now.

#4 Post by edik » Mon Nov 06, 2017 11:37 am

And the RTC Battery was just the start :)

Not sure about the 701C or whether the trend started with the 76X series but I always appreciated the complete modular system simply by lifting up the Keyboard.

http://a4.pbase.com/g10/46/470146/2/166 ... 46SpOL.jpg

Disk Swap? RAM Swap? Floppy/CD Swap? All could be done in a matter of seconds.... and color coded!

The old days!

2017: T450 i5-5300U/12/256+32/FHD
2007-2014: T520/i7-2760QM/8GB/320GB, WSXGA+, X200s, T500, A31p, A30p, T42p, X60s, X32, X31
Gone but not forgotten 1998-2006: 2006 T43p 2668-H2G (2GB/60), T22 2648-8EG (128/20), 2005 X40, X31, 2004 T30 SXGA+, 600X, 2003 770 P233+DVD Card, 760XD 1998 760XL+104MB

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Re: I'm so appreciating IBM's thoughtfulness in RTC batteries right now.

#5 Post by Thinkpad4by3 » Mon Nov 06, 2017 11:44 am

Started with the 750 series I believe. The 755 series does infact have it.
Welcome to the jungle, we have FrankenPads
If you want it you're going to bleed, but that is the price to pay
And you're a very rare mobo, very hard to get
You can see the blinky lights, but you won't get them for free.

edik
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Re: I'm so appreciating IBM's thoughtfulness in RTC batteries right now.

#6 Post by edik » Mon Nov 06, 2017 3:42 pm

Hmmm not sure why the image isn't showing... it was when I posted... and it is hosted on my pbase account!
Started with the 750 series I believe. The 755 series does infact have it.
Well I suspected actually the 755 onwards.... should have mentioned that... drat.... never however played with a 755 although have most of the 76X series and 770....

2017: T450 i5-5300U/12/256+32/FHD
2007-2014: T520/i7-2760QM/8GB/320GB, WSXGA+, X200s, T500, A31p, A30p, T42p, X60s, X32, X31
Gone but not forgotten 1998-2006: 2006 T43p 2668-H2G (2GB/60), T22 2648-8EG (128/20), 2005 X40, X31, 2004 T30 SXGA+, 600X, 2003 770 P233+DVD Card, 760XD 1998 760XL+104MB

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