Laserjet 4 61.1 error and memory test??

[Guest]

Archived from groups: comp.sys.hp.hardware (More info?)

My trusty old LaserJet 4 is now giving occasional 61.1 errors, which
supposedly refer to the first memory SIMM being bad.

*But* it never says this when doing the self test. Hmmm.
I'm wondering:

(1) Why doesnt the self-test detect this?

(1.5) Is there some more rigorous memory test hidden away somewhere?

(2) could this be some different error masquerading as 61.1 ??



Any hints appreciated,

George

 

[Guest]

Archived from groups: comp.sys.hp.hardware (More info?)

To further diagnose the problem, I would open up the metal door covering the
memory slots, give the inside a good cleaning with compressed air (could dust
and dirt be inhibiting contact?), and then switch around the memory SIMMs among
different sockets. Keep track of which SIMM goes where. Make sure that all the
SIMMs have tin-plated edges, not gold-plated. Gold-plated SIMMs in tin-plated
SIMM sockets have long been known causes of oxidation, which inhibits good
electrical contact.

The 61.1 error indicates that the SIMM in socket #1 is suspect. See if that
particular SIMM causes a 61.2 or 61.3 error when moved to a different socket.

Get yourself some high-quality 72-pin fast-page mode SIMMs which conform to
strictly to JEDEC specifications for serial presence detect (SPD), the
electronic handshake used to auto-determine SIMM capacity. EDO SIMMs will NOT
work. HP LJ4 and LJ5 series printers are picky about which SIMMs they can use,
altho not so picky that you can only use HP-branded SIMMs... Ben Myers

On 8 Oct 2004 04:43:40 -0700, grg2@comcast.net (George R. Gonzalez) wrote:

>My trusty old LaserJet 4 is now giving occasional 61.1 errors, which
>supposedly refer to the first memory SIMM being bad.
>
>*But* it never says this when doing the self test. Hmmm.
>I'm wondering:
>
>(1) Why doesnt the self-test detect this?
>
>(1.5) Is there some more rigorous memory test hidden away somewhere?
>
>(2) could this be some different error masquerading as 61.1 ??
>
>
>
>Any hints appreciated,
>
>George