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T43p Intermittent Start

T40/T41/T42/T43 Series
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TPFanatic
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Location: Boston, Massachusetts

T43p Intermittent Start

#1 Post by TPFanatic » Tue May 02, 2023 10:15 am

AC in, it charges battery, press power button and it goes lights off.
Pull cmos battery and reinstall no change.
No battery no change.

Intermittently it will succeed to start.

Just curious if there's a simple (haha as if) fix to make this extinct unit operable. It has a nice 14" SXGA+ and the 2.26 ghz PM. Maybe transplanting the mobo into a nicer 15" chassis will inspire it to behave.

kfzhu1229
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Location: Toronto, Canada

Re: T43p Intermittent Start

#2 Post by kfzhu1229 » Tue May 02, 2023 2:52 pm

TPFanatic wrote:
Tue May 02, 2023 10:15 am
AC in, it charges battery, press power button and it goes lights off.
Pull cmos battery and reinstall no change.
No battery no change.

Intermittently it will succeed to start.

Just curious if there's a simple (haha as if) fix to make this extinct unit operable. It has a nice 14" SXGA+ and the 2.26 ghz PM. Maybe transplanting the mobo into a nicer 15" chassis will inspire it to behave.
I have yet to have this problem on ThinkPads, but on other branded laptops when this happens I just start swapping out the 3.3 and 5V main filtering capacitors and sometimes that would fix your problem (HP Compaq business laptops can have this problem). Usually tired capacitors have this weird property that they work better on battery power than they do on charger power (doesn't matter if battery is installed or not)
On ThinkPads sometimes this can also be a shorted component. But since yours does start up and assuming that it is fully functional when it does work... But check the motherboard for any overheating components like capacitors etc that might actually still be shorted.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

Tom81
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Posts: 53
Joined: Mon Nov 14, 2022 6:16 am
Location: Stalowa Wola, Polska

Re: T43p Intermittent Start

#3 Post by Tom81 » Tue May 02, 2023 6:18 pm

I suggest removing all unnecessary components and run with one working RAM
390X,570E,600E,iSeries1200,A21m,A30P,A31,A31P,G40,R30,R31,R32,R40,R40e,R50,R50e,R51,R51e,R52,R60,R400,
T20,T21,T22,T23,T30,T40,T41,T41P,T42,T43,T60,T400,X24,X30

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