Having problems with your CMB T43 750 Notebook ?

Laptop freezing acer aspire 5520

\015 The problem began 2 months ago while my brother was working with Photoshop, the laptop froze unexpectedly. We rebooted it and it worked fine for some days until it froze again while I was moving the unit through the house.\015\012GTA4 made things worse, it started to freeze once a day as a minimum. Some days later, when the laptop froze again and again, I realize it has started to show black lines on screen when pressing somewhere around the keyboard. The freezing has happened many times when entering GPU-Z or any other GPU monitoring program.\015\012\015\012Now my laptop is almost unusable, I cannot work with any intensive application (whether CPU or GPU intensive) without having to shut down the laptop, waiting a while and then powering it back on.\015\012Sometimes when it freezes it makes a weird sound like "sssszzzzzzzzzzZZZZT" and then shuts off.\015\012\015\012I've cleaned dust off heatsinks and fan. I tried to use it with and without a battery, I replaced DIMMs, I tried removing HDD/CD-R/Modem/Wifi.. same problem.\015\012\015\012I tried booting it without a GPU but it does not pass POST or load Windows. \015\012\015\012Next step will be replacing thermal pads on the chipset and CPU power units (I just cannot find them in my country).\015

Answers :

Guys, so far the main defect of the Acer Aspire 5520 is the video chip, it has to be replaced, and even so that will not last, since the board also has design problems which lead to the video chip failing again, so, this laptop model is good for as long as the defect is absent. Better get a new one.
I've had an hp that was freezing and then it would turn on but no screen. They said it was the thermal pad on the cpu. I had another dell that did something like as you described. I changed the cpu from celeron to p4. eventually you'll find that it is the chip that is defective. Thermal pads or thermal paste can be found at an electronic store like radio shack, best buy, comp usa. If the harddrive is making noise or that sound you described or freezing you wouldn't be having the black lines, its still a bit expensive but when replacing the chip, thermal paste or pads need to be applied.
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