Text 22739, 62 rader
Skriven 2006-10-18 21:20:00 av JAY EMRIE (1:123/140)
     Kommentar till en text av JEFF GUERDAT
Ärende: Re: Toshiba Laptop 5005-S
=================================
JG>> JG>I suspect a faulty connection on the connector or motherboard
(poor JG>> JG>solder joint).  Short of some major surgery it's not likely
to change. JG>>  JG>> JG>In your case, it may also be related to memory
speed.  Check to see if JG>> JG>you can determine whether there's an SPD
(serial presence detect) EEPROM JG>> JG>on it - it's a very small chip
with 8 legs (I think).  That's programmed JG>> JG>with specs for the BIOS
to read and use relative to the timing needed by JG>> JG>the memory.  The
lack of SPD may result in the system not being able to JG>> JG>set itself
properly to use the particular DIMM. JG>>  JG>> That begs a question.
Why/how would it suddenly cause a working memory JG>> card to fail?

JG>Certainly a motherboard or socket problem could cause that although I 
JG>don't recall if the original memory DIMM was determined to be actually 
JG>faulty or if you just decided to replace it because the symptom seemed 
JG>to indicate that it had.  Like my daughter's problem, I could somehow 
JG>cause it to resolve itself only to fail again, leading me to the 
JG>impression that it's a socket or motherboard problem...

The memory failure "just happened" - no diddling inside the laptop.

Removed one memory card which evidently turned out to be the high order
card 256 to 512 and system still booted and showed 256 which obviously
was the low order card.

Bought a new mem card - inserted it into the high order slot - no work -
showed 256. Put it in  the low order slot - no boot.

Bought another mem card and put it in the low order slot - no boot.

System still boots with the original low order mem card in the low order
position.

The original card is marked:    The last replacement card is marked:
256 Mb PC133 SDRAM                      256 Mb SDR SODIMM 133
                                  AH! maybe that is why the last new
                                                card fails
I'm assuming you mean on the mem card.
It does have a small chip w/8 legs marked
I1 D
AT02

and the last replacement card also has an 8 leg chip marked
66G
24C021


Come to think of it - the first replacement card WAS also a SODIMM card.
SODIMM cards are taller than SDRAM cards by about 3/8"


I would guess SDRAM and SODIMM mem cards are NOT compatible.
Now to take the SODIMM back and get a refund and find a SDRAM 256
card. Guess it will end up being an internet search.

Thanks for the input Jeff. Made me look closer and think a bit.

Jay


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