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Remove the battery and use the laptop with the adaptor plugged in to check if it still shuts down after one hour. Do a similar test with the fully charged battery installed and the adaptor NOT plugged in. If no problem with both tests there may be a problem with the charging circuit or possibly the battery.
When does it shut itself off? Is this happening time you press the power button and during the boot cycle it shuts off without completing the boot to windows? If it shuts down after you've worked on it for a while it could be that it is running hot. If you let it sit a while to cool off then press the power button, if it completes the boot cycle and allows you to work it is definitely running hot. Normally when they run hot if you immediately try to reboot, it will fail. If you let it cool off it will boot successfully. Computers run hot because of a fan not working, dust clogging the fan vents or the Thermal Paste around the CPU and Heat Sink has become hard or too thin to keep the unit cool. If it's not running hot you might have a power supply or motherboard issue. Try removing the power cord and press and hold the Power Button for 30 seconds to release any Static Buildup. Then plug the power cord back in and try to reboot.
If the fridge is "gurgling" then there is one of two problems. Either you have a bad thermistor, which is not allowing the fridge to cool down properly, or your cooling unit is becoming plugged. If you run the unit on gas and get no check light, remove the outer cover and place your hand on the cooling unit, if it is just too hot to keep your hand on, then move your hand up the back. Feel the unit to see if there is a spot where the cooling unit begins to cool off. If so, that is where your blockage is.
There is also the possibility of air bubbles in the system. There is a procedure known as "burping" the unit but it is quite extensive and time consuming. 1. Remove the fridge from the unit, paying attention to electrical connectors and being sure to shut off the gas line and remove it from the fridge. 2. Pull the fridge onto the floor in the unit (providing there is room) and lay it on it's right side. Let it set for 8 hours and then turn it on its top for 8 hours and the its left side for 8 finally standing it back up. This procedure will burp the air bubbles out of the unit and allow it to work correctly.
Normally when this happens it is because the impedence load is too small. This unit requires 8 Ohm speakers. If you connect 4 Ohm speakers, it will work, but work harder and generate excessive heat. If the heat is too much, the unit will enter protect mode and shut down. Once it cools off, it will work again. In your case, if the speakers are the correct impedence, check for crossed wires. If that is the problem, running the unit at higher volume levels should cause it to shutdown sooner.
cud be your onboard voltage regulator for the battery charging. if you remove the battery and use the external power source does it smell also?
if the battery charges normal out of the unit, and the laptop works well with the AC power unit without the battery, then it's your voltage regulator for the batt charging