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T460s won't power up.

T430-T490, T530-T590 Series
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Gord K.
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Joined: Sat Dec 31, 2005 9:01 pm
Location: Canada

T460s won't power up.

#1 Post by Gord K. » Tue Nov 23, 2021 2:10 pm

I have a refurbished T460s that I bought through Staples (in Canada) in January or February of this year, so any limited warranty that may have come with it is long gone. Since day 1 the batteries have not really held a charge but this was not a huge issue because the laptop sits on a desk and is usually used with the power bar on. Yesterday I went to use the laptop and it powered up and then immediately powered off. I turned on the power bar and powered it on again and checked the batteries which were sitting at 1%. Shortly after that the laptop powered itself off again and now I get nothing. And I mean NOTHING! The green light beside the power plug is not even on.

Do I just have two beyond dead internal batteries or has something else died?

Thanks,

Gord

RealBlackStuff
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Re: T460s won't power up.

#2 Post by RealBlackStuff » Tue Nov 23, 2021 11:00 pm

Remove both batteries and the charger, then hold down the Power button for ~20 seconds, then plug in only charger and try to boot.
If OK, get new batteries.
If not, let us know.
Lovely day for a Guinness! (The Real Black Stuff)
IBM: T23 (XP/SP3) - Lenovo: X240, X250, T440p, M900 Tiny (all with W7/SP1)

Gord K.
Posts: 34
Joined: Sat Dec 31, 2005 9:01 pm
Location: Canada

Re: T460s won't power up.

#3 Post by Gord K. » Wed Nov 24, 2021 10:23 am

Thanks @RealBlackStuff. I tried what you suggested and I get nothing, no lights, no beeps, no response at all. And to take it one step further, I have two of these refurbished T460s’ and I tried the other power adapter as well - same results.

Is it a paperweight?

Gord

SAIYAN48
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Re: T460s won't power up.

#4 Post by SAIYAN48 » Mon Nov 29, 2021 10:53 pm

Remove main batteries, then the CMOS and give it AC power. It should turn on.
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Gord K.
Posts: 34
Joined: Sat Dec 31, 2005 9:01 pm
Location: Canada

Re: T460s won't power up.

#5 Post by Gord K. » Tue Nov 30, 2021 10:35 am

Thanks @saiyan48, I removed both batteries, unplugged the CMOS battery, and pressed the power switch for a slow count of 20. When I plug in the AC adapter not only does the laptop NOT power up, the green LED beside the power plug is not lit (as it is on my other T460s).

Any other ideas?

Gord

Gord K.
Posts: 34
Joined: Sat Dec 31, 2005 9:01 pm
Location: Canada

Re: T460s won't power up.

#6 Post by Gord K. » Thu Aug 04, 2022 9:31 am

I am just a little disappointed. With all of the knowledge and experience various members of this forum have, after 9 months and over 3000 views, no one has offered any further opinions on my unresponsive T460s. I am assuming that I have a dead motherboard but it sure would be nice to have had someone confirm that suspicion. We can do better than this when people come looking for help.

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Re: T460s won't power up.

#7 Post by dr_st » Fri Aug 05, 2022 9:38 am

There is only so much people can confirm remotely, without any diagnosis tools...

To me, it sounds like something very basic is dead in the power circuitry, based on the LED does not even come on symptom.

I think some folks here know the fuse maps of these boards, they can suggest which fuses to check. I do not have that knowledge.
Thinkpad 25 (20K7), T490 (20N3), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad

Gord K.
Posts: 34
Joined: Sat Dec 31, 2005 9:01 pm
Location: Canada

Re: T460s won't power up.

#8 Post by Gord K. » Sat Aug 06, 2022 9:12 am

@dr_st thank you. Having spent several years in hardware support (in the ‘80’s) where my job was to troubleshoot large disk drives over the phone I appreciate the difficulty diagnosing problems from a distance! But as you suggest, there are people here who know these machines and could probably give me some guidance. It is discouraging that in 9 months none of those knowledgable people have offered any further suggestions.I have a soldering iron and multimeter (and do know how to use them) and though my eyesight at 70 is not what it used to be, the laptop doesn’t work so I have nothing to lose by trying to fix it. I just won’t tackle it blindly. I have always found the members of this forum to be helpful… until now.

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Re: T460s won't power up.

#9 Post by RealBlackStuff » Sat Aug 06, 2022 10:55 am

Get the (free) T460s schematics here: https://www.alisaler.com/thinkpad-t460s ... schematic/
Check the (power)-fuses for continuity.
Try another power supply, maybe try another outlet?
Lovely day for a Guinness! (The Real Black Stuff)
IBM: T23 (XP/SP3) - Lenovo: X240, X250, T440p, M900 Tiny (all with W7/SP1)

Gord K.
Posts: 34
Joined: Sat Dec 31, 2005 9:01 pm
Location: Canada

Re: T460s won't power up.

#10 Post by Gord K. » Sat Aug 06, 2022 12:41 pm

That gives me something to try and look at, thank you.

I have tried three different power adapters in at least two different outlets. Nothing. All three adapters are 20Vdc, one is 2.25A, one is 3.25A and the third one is 4.5A; which one is correct for a T460s? Keep in mind, I have two T460s' and both are refurbished. The 4.5A adapter is from my Lenovo G50, the 3.25A adapter has a white label on it that says "E540/560/570".

dr_st
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Re: T460s won't power up.

#11 Post by dr_st » Sat Aug 06, 2022 11:22 pm

A T460s will run off all three, although the 2.25A one is a bit borderline. Nonetheless, they should all get the laptop to turn on, unless there is a problem with the laptop itself.
Thinkpad 25 (20K7), T490 (20N3), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad

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