Procedure entry point rt 1 extendheap could not be located..

[CallDon]

Love my T43 so much that I just paid around $300 for a new mother board for it, almost what I payed for it refurbished. Sunday afternoon, left town for a thanksgiving trip home. Second day there, rebooted the computer and got the message "Procedure entry point rt 1 extendheap could not be located in the dynamic link library."

When I boot up, I got the flash screen followed by a black screen until I turn the switch off. When I try to boot in safe-mode, I get the above message. I don't remember the T43 came with discs or not, since it was refurbished, I don't think there were any discs.

Any suggestions??

Thanks,

D*

[rkawakami]

The "dynamic link library" is a file (.DLL) on your hard drive. The error message should display which .DLL it's trying to access. In any event, I'd try the following before attempting an OS re-install:

- re-seat all memory modules and run a complete memory diagnostic (memtest86+)
- assuming that the memory check comes back without any errors, run a read-only disk diagnostic. PC Doctor for DOS or the disk drive manufacturer's own disk utility program.
- if the disk checks out okay, re-boot into Windows and see if everything is back to normal

[CallDon]

The "dynamic link library" is a file (.DLL) on your hard drive. The error message should display which .DLL it's trying to access. In any event, I'd try the following before attempting an OS re-install:

- re-seat all memory modules and run a complete memory diagnostic (memtest86+)
- assuming that the memory check comes back without any errors, run a read-only disk diagnostic. PC Doctor for DOS or the disk drive manufacturer's own disk utility program.
- if the disk checks out okay, re-boot into Windows and see if everything is back to normal

------------------------

I will try to reseat the memory stick that I can reach. I installed a 1-gb stick after I bought it...I think. Don't think I can reach the other.

Thanks for the suggestion. I will give it a try..

D*

[CallDon]

The "dynamic link library" is a file (.DLL) on your hard drive. The error message should display which .DLL it's trying to access.

I would assume that "rt 1 extendheap " is what it can't find.

D*

[rkawakami]

The T43 has two memory modules; one installed underneath the keyboard and one accessible from behind a small rectangular panel on the bottom of the laptop. To get to the one under the keyboard, you need to remove 3 or 4 screws. They should be marked with a icon resembling a keyboard next to the holes where the screws are located. The instructions can be found in the Hardware Maintenance Manual:

http://www-307.ibm.com/pc/support/site. ... MIGR-58837 (for types 1871, 1872, 1873, 1874, 1875, 1876)
http://www-307.ibm.com/pc/support/site. ... MIGR-58791 (for types 2668, 2669, 2678, 2679, 2686, 2687)

.DLL fliles contain executable code (i.e., a computer program) that can be used by any other program that knows how to reference it. If you are slightly familiar with computer programming, a .DLL essentially contains subroutines that perform various functions. Other programs have been told what the names of those functions are (the "entry point") and which file it can find them in (the name of the .DLL file). Either the program which is trying to invoke the "rt 1 extendheap" function is confused, through a memory or disk error, or the .DLL file is missing or corrupted (again, a disk error). That's why I advise checking both the memory and disk drive for errors.

I've tried searching for "rt 1 extendheap" with both Google and Yahoo and the only reference I see is this thread . Are you sure that this is the exact error message being displayed?

[Mike Blake]

Hmm, but a search on "extend heap" reveals many tutorials for hackers on how to exploit security weaknesses. Is a virus a possibility?

[CallDon]

Hmm, but a search on "extend heap" reveals many tutorials for hackers on how to exploit security weaknesses. Is a virus a possibility?

Haven't had a chance to reseat the memory stick yet. But couldn't someone with an emergency boot disk or something find the problem?

I don't really remember if this came with boot disks or not, but I don't think so since it was refurb.

D*