Question about IBM ThinkPad R51 Notebook
First, the simple things need to be checked. Is the power supply line, from the wall socket to the computer input socket, in good condition. Best test is to try it on a known working Thinkpad or with a multimeter if one is handy.
Second, connect to an outside monitor to rule out faulty laptop monitor. If the known working monitor paired with the R51 works perfectly then you know it is your screen.
Third, does moving or flexing the computer by its base when running exacerbate the problem?
That will get some preliminary data.
Posted on Apr 18, 2009
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Symptoms of a broken power jack
1. If you wiggle the power cord or the AC Adapter connector on the back of the laptop, the power LED and battery charge LED start to flicker.
2. Battery will not charge in the laptop.
3. Laptop runs fine off a charged battery.
4. With the AC Adapter connected the laptop appears to be dead.
No power LED or battery charge LED activity.
5. Laptop randomly powers off without any warning.
If your laptop is out of warranty, then you can fix the problem by re-soldering DC-IN jack on the system board. If it's still under warranty, it would be fixed at no charge to you.
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