笔记本常见故障（国外英文资料）.docVIP

笔记本常见故障（国外英文资料） Everyone has 110 cases of computer trouble 1, failure: two IBM T21 laptop, a switch, the panel lights flash out, another boot operation after 1 hour, automatic shutdown after not triggered (unstable)? Method of repair: this phenomenon has a lot to do with the control IC ADP 3421 of the CPU core power supply, and the two laptops replace this IC (ADP3421), and this is OK. Note: if there is a problem with this IC, it is better to replace the ADP3410 with the customer after maintenance for three months. Troubleshooting: IBM T22 Ben, unstable (sometimes booting, sometimes not)? Does maintenance methods: OK, after change the memory clock to carry on the test machine, found that the unstable (not shown) diagnosis after card run 39 code, doubt is northbridge empty welding, after welding chipset and graphics card, OK. Fault: NEC notebook, after turning on, the indicator light indicates normal, (hard disk light display and then extinguish) but not show, the external display also does not show The method of repair: start to doubt the graphics card bad, but find the hard disk, the power source and other indicator lamps are normal instructions, so the doubt Bios data have a problem, then brush the Bios, OK. Troubleshooting: IBM notebook, not turned on when you receive (the customer introduces that sometimes you can turn on, sometimes not boot)? Repair method: change the ADP3421 first, can trigger, but not the CPU, remove the memory after the memory and the memory slot, OK. Troubleshooting: IBM laptops, sometimes switched on (sometimes with random black screen after boot)? Does maintenance methods: replace ADP3421 first, boot after two hours, and the black screen, fault and replace Max1714 (north side) to boot, dont run the CPU, then replace a CPU, troubleshooting, and estimates the CPU pins internal poor contact. Failure: Toshiba laptop, turn on screen dark Does maintenance methods: external screen can show, began to suspect that is high pressure there is a probl