This is an IBM / Lenono T43 laptop. The addon ram card suddenly failed after many years. Several times in the past year the computer would blue screen or lockup. Removing that ram card fixed it for awhile. Now its just dead and Im running the laptop without it. Choosing the right card seems difficult.
shows three types of T43s, all of which use PC2-5300 memory:
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Unless Crucial's database is wrong (it's been known to happen) your old PC2700S memory is incompatible with your T43 laptop. Incompatible memory can cause your laptop to blue screen on you or not boot.
Thank you, 73,
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Don Kuenz, KB7RPU
There was a young lady named Bright Whose speed was far faster than light;
It is a bit elderly to bother repairing. Exactly which model of T43? Are you sure about 118 pin and 2.5v?
Thinkpad Lenovo say T43s memory spec is:
?PC2-4200 CL4 Non-Parity (NP) Double Data Rate Two (DDR2) Synchronous DRAM (SDRAM) SO-DIMM memory ?200-pin SO-DIMM with gold-plated leads ?256 MB, 512 MB, or 1 GB PC2-4200 CL4 NP DDR2 SDRAM SO-DIMM ?Supports up to two 1GB SDRAM SO-DIMMs
PC2-4200 and PC2-5300 both belong to the same family. Either module can be used. Crucial, naturally, sells only the latest evolutionary member of the family. For this case Crucial's database is correct. Their database is inevitably correct. It only failed me once out of about a thousand queries. They immediately updated it after the failure was reported to them. Their database can also indicate the feasibility of using a given memory module. It's a big red flag when they don't sell a particular module. Although it may not be a show stopper. Crucial also provides excellent memory documentation to the public gratis.
Thank you, 73,
--
Don Kuenz, KB7RPU
There was a young lady named Bright Whose speed was far faster than light;
Wouldn't that be magnetic core memory - for valve based RAM? Magnetic bead lattices...tube jukeboxes (Seeburg) used them for memory back in the late 50s and right through the 70s.
On Thu, 17 Oct 2019 14:02:06 -0000 (UTC), "Don Kuenz, KB7RPU" wrote:
There is 512mb ram built in. You gotta rip the whole laptop apart to get to it. The card that failed is the easy to access SECOND (addon) card.
This is a TYPE 2379. Thats not listed
Motherboard Model: IBM 2379RFU
That addon card worked for the past 8 years or so. It began acting up after I slammed on my brakes (deer ran in front of me), and the computer flew off car seat. Removing that second card fixed it, but it sure is slow now.
Using HWinfo32. This is what my first card lists as:
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