Search found 5 matches

by rggrgg
Sun May 22, 2005 7:19 am
Forum: Thinkpad - General HARDWARE/SOFTWARE questions
Topic: LCD connectors and other strange questions
Replies: 5
Views: 882

Any Luck?

I want to do this as well - have you had any luck? My thinking is to use lengths of cat5 cable - if it can do 100 Mbps over 100m, it should be ok for ~2m. Having dismantled my LCD panel (from a T21), looks like you need to take the two power wires from the inverter (I'll leave the inverter connected...
by rggrgg
Mon Mar 07, 2005 3:39 pm
Forum: ThinkPad T4x Series
Topic: T21 Dock Connector Pinout / External Start
Replies: 5
Views: 757

Solution

I realise this is a conversation with myself, but again in the interests of completeness, I have found that momentarily grounding pin 201 of the dock connector does what the power button does. This pin is connected via a resistor to the power button on the dock, fairly easy to trace.
by rggrgg
Thu Mar 03, 2005 5:42 pm
Forum: ThinkPad T4x Series
Topic: T21 Dock Connector Pinout / External Start
Replies: 5
Views: 757

Laptop power

It's in the boot/trunk of a BMW running as an mp3 server, linked to the entertainment bus so it can be controlled from the front console. It needs to power up without any intervention, and only consume power when the ignition is on.
by rggrgg
Wed Mar 02, 2005 4:52 pm
Forum: ThinkPad T4x Series
Topic: T21 Dock Connector Pinout / External Start
Replies: 5
Views: 757

non-ideal solution

Hi - just for completeness, I did solve this in the end. Simple RC circuit with transistor to drive a solenoid. Switched 12v pulses transistor on briefly (RC turns it off), drives solenoid, solenoid mounted so that it presses the power button. Stupid and mechanical, maybe; but it does work, and no a...
by rggrgg
Sun Jan 23, 2005 1:37 pm
Forum: ThinkPad T4x Series
Topic: T21 Dock Connector Pinout / External Start
Replies: 5
Views: 757

Me To

Hi - I want to do exactly the same. Did you have any luck doing this? I've found someone somewhere who claimed they'd done a simple circuit which would do this (not on a thinkpad). I think I could handle the circuit, but it's hard to figure out where to apply the relevant signal on the motherboard w...

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