Search found 7 matches

by Snowflake
Mon Aug 07, 2017 9:20 am
Forum: ThinkPad T430/T530 and later Series
Topic: Keyboard - some keys stop working - T540 hardware problem
Replies: 2
Views: 363

Re: Keyboard - some keys stop working - T540 hardware problem

I suspect the issue starts with grains of salt entering the keyboard (yes I do eat chips above the keyboard!). Then maybe when fluids or rain enters the keyboard it shorts some high-impedance lines. I never washed any of my keyboards. But next time I open the laptop I will test this theory by washin...
by Snowflake
Mon Aug 07, 2017 9:15 am
Forum: ThinkPad W530/W540/W550 Series
Topic: Keyboard - some keys stop working - W540 hardware problem
Replies: 4
Views: 1037

Re: Keyboard - some keys stop working - W540 hardware problem

The salt theory is essentially verified. I deep bathed the bad keyboard with the missing column of keys, with hot and cold water. After drying it out, I put it back in the laptop. Lo and behold, the missing keys which had never responded in any of my tens of attempts were now working. This is the fi...
by Snowflake
Fri Aug 04, 2017 5:27 pm
Forum: ThinkPad W530/W540/W550 Series
Topic: Keyboard - some keys stop working - W540 hardware problem
Replies: 4
Views: 1037

Re: Keyboard - some keys stop working - W540 hardware problem

After replacing three keyboards and finally getting a stable one, I would like to offer this theory: Problem is only with the backlit keyboards, and non-backlit seems to be more stable. Furthermore, I suspect the issue starts with grains of salt entering the keyboard (yes I do eat chips above the ke...
by Snowflake
Thu Aug 03, 2017 1:15 am
Forum: ThinkPad W530/W540/W550 Series
Topic: W540 warning - bad battery connector
Replies: 0
Views: 202

W540 warning - bad battery connector

My original 9 cell Lenovo battery pack dropped from 3 hrs to 2 hrs capacity after a couple of years. So when it stopped working, "battery not detected", I thought it was forced into retirement due to low capacity. In fact I opened the pack and all cells were within millivolts and were good to at lea...
by Snowflake
Wed May 03, 2017 4:31 pm
Forum: ThinkPad T430/T530 and later Series
Topic: Keyboard - some keys stop working - T540 hardware problem
Replies: 2
Views: 363

Keyboard - some keys stop working - T540 hardware problem

The T540 keyboard has about 7 of its keys, stopped working. The seven keys are usually on the right hand side and in a group, but could be in any row, and within 1 or 2 columns of each other. Pressing the key does nothing, not even the click in click mode. I am convinced this is not a software probl...
by Snowflake
Tue May 02, 2017 9:43 pm
Forum: ThinkPad W530/W540/W550 Series
Topic: Replaceable fuse inside the 170w power supply?
Replies: 6
Views: 799

Re: Replaceable fuse inside the 170w power supply?

There is a relative easy way to convert an ordinary power charger, as small as 65 W, to work with the W540. I saw that on Lenovo forums, or maybe here. Basically you order an adaptor for a few bucks from the charger round plug to the square power connector format. Open up the square plug in the adap...
by Snowflake
Tue May 02, 2017 9:12 pm
Forum: ThinkPad W530/W540/W550 Series
Topic: Keyboard - some keys stop working - W540 hardware problem
Replies: 4
Views: 1037

Keyboard - some keys stop working - W540 hardware problem

For the 4th time, the W540 keyboard has about 7 of its keys stop working. The seven keys are usually on the right hand side and in a group, but could be in any row, and within 1 or 2 columns of each other. Pressing the key does nothing, not even the click in click mode. I am convinced this is not a ...

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