Casually open and close the screen a few times, the screen in the flip process is slightly tight, of course, if it really is a new machine, this problem exists is reasonable. As long as the screen is not obviously loose feeling can be, if there is a greater sense of looseness, that means that the screen spindle wear is more serious, the screen is likely to be unable to set in the position you want, at the same time the screen line will be affected by the impact of the loose, and ultimately affect the screen display, so this is not to buy the book of course. Open the screen at the same time should also check the screen hook is intact, use the hook is smooth. If the hook is not intact, then the laptop screen is likely to be unable to close tight. For double hooks single switch used laptop must pay attention to the two hooks are not synchronized. After opening the screen to try to knock the keyboard and use the mousepad, very comfortable, each key falls and pops up to make a very dry, no sticky hand feeling. With a little bit of force to hold down the mouse touchpad to all directions rubbing, the touchpad has no signs of loosening.
And then down to the next is the check of each interface, first check the PC card empty slot and fill the empty slot of the removable memory, the bottom of the body of the port replicator file plate, and the port cover is intact and can be a normal action, these small things are not the machine is not enough to look good but does not affect the use of the machine, but it can be used as a cut JS's capital. Prepared PC card and flash drive into the interface to see if the insertion and dialing is normal, if it is very difficult, it means that the inside of the bracket has been deformed. Then look at the network card and MODEM interface pins are intact. Also observe the power adapter interface and host jack is matched, if inserted more than a cut or very loose, the power adapter is certainly not the original, which is not necessarily a major problem, but always poor contact is always very annoying, and the machine is also damaged. Also look at the anti-theft lock on the laptop, if it is damaged here, it is basically certain that it is black.
Finally check other accessories, see the nominal specifications on the power adapter and host specifications are the same, especially the voltage must be the same, otherwise it will burn the host, the current if different, the adapter current than the host is slightly larger than the host can be accepted than the host if you can not want to be small, which may lead to a long time of charging or the battery is not enough to charge the host in the host of the high load running time may also be due to insufficient power supply to cause damage to the host. Insufficient power supply may cause damage to the host. Make sure the power adapter is 110~240V, otherwise, if you buy a 110V adapter, it will be burned or even damage the host in a moment. Carefully check whether there are traces of glue injected into the joints of the battery's splicing and whether there are uneven seams, if there are then it means that this battery has been opened for repair. Check the base, try to put the machine on the base and then eject it, observe whether the ejector lever is smooth and strong, if not, then we must first consider whether the machine can be easily removed from the base. After a quick check I found that the machine was indeed as JS said it would be, and if I hadn't blown it off, it would have been a completely new machine. It seems that today's luck is really good, but now is not the time to be happy. Because if the above steps of the test are passed, then only a preliminary sure to find a good maintenance, good color machine, but a machine without problems in appearance is not equal to the operation of no problem, so be sure to boot and log on to the system to test.
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The bottom of the kettle - anti-softness
The boot into the BIOS system, of course, the first to hold down the PAUSE key to see the basic configuration. PIII-M 1.2GHz/INTER 830MP, 256M RAM, 40G hard disk, ATI PIII-M 1.2GHz/INTER 830MP, 256M RAM, 40G HDD, ATI RADEON MONILITY/16M. yes, the N410C's high end. The method of entering the BIOS is different because the machine is different, so the keys are different, the most used are F2, DEL, ESC three, usually when the machine is turned on the bottom of the screen will display the method of logging into the BIOS and the BIOS version number. After entering the BIOS, the main thing is to look at the serial number and the same serial number on the body is not the same, if not the same, in all probability are assembled machine. And you can also see whether the machine is set up a password, if so, must find the JS to ask, if the JS does not know the password, or be careful about the source of the machine it. After looking at the BIOS, of course, the normal boot to the operating system, estimated the time from the self-test to the completion of the system boot, very quickly, indicating that the machine is very normal. If you find that it takes a long time for the machine to fully boot up the system, it's likely that the machine has some hardware problems.
After logging on to the system, because I look at the machine is WIN XP PRO operating system, so first select the Control Panel - User Accounts, to see if the login is not Administrator group of users, do not think that this is redundant, because do not use the Administrator group of users to log on to the system. Administrator group user login will cause a lot of trouble in the future use of the machine, and if the JS does not know the Administrator group login password, then you can be sure that the machine is black. Next is to open the device manager to expand each branch to see if all the hardware has been correctly loaded, if there is a yellow question mark or exclamation point with the machine's driver has not been installed completely, some accessories can not be used, this time must be JS can provide. Plug in the flash drive to see if it can be recognized correctly.
Insert the prepared CD-ROM and floppy disk to observe the work of the optical drive and floppy drive to see if the reading disk is smooth. If it takes a long time for the optical drive and floppy drive to read, it means that the optical head and magnetic head are aging and it is best not to buy them. Try to copy a larger capacity disc to the hard drive, several times if time permits, as some optical drives will not recognize the disc once it gets hot. If it is a DVD optical drive, try to play and read DVD and CD-ROM, don't be afraid of trouble, a lot of second-hand machine DVD optical drive only recognizes DVD but not CD-ROM. since the optical drive is COMBO with burning function, take out the unsealed CD prepared before and try to burn it. The optical drive and floppy drive work fine, except that the wind noise seems to be louder when the optical drive is working.
Used for a period of time without external power supply, mainly to simply test the approximate operating time of the battery, because the battery must try to charge, plug in the power adapter before looking at the bottom of the nameplate logo and power adapter on the reverse side of the logo, the main voltage and current specifications and the host is the same, and is to look at the brand and model of the power adapter and the host of the brand and model of the same, even if the OEM should also be the same. Even if it is OEM, there should be a small line of identification for a certain brand product XX model. If the battery power is higher than 90% is possible not to charge, but just now the use of the battery has been put below 90%, the battery has been automatically charged, and the host on the display light is also lit up. If you find that the battery will not charge at all, it means that the battery, power adapter or charging circuit has a problem, this machine can not be purchased, a laptop and desktop can not use the battery what is the difference? After booting into the system, start counting the time, and then see how the battery is consuming, no one wants to buy a machine with so little battery life.
Install a few of your favorite software (preferably large software such as OFFICE, PHOTOSHOP, etc.) and use it casually to see if it works properly and smoothly. The use of NOKIA screen test software, the screen background into a solid color, and then gently shake the screen back and forth, and tapped the top cover, during which to carefully observe the screen whether there is a splash screen or a larger flicker, if there is, indicating that the machine has a problem with the screen line, it may be when the screen will not work. Pay special attention to the screen whether there is vertical or horizontal through the screen of the bright line, if so, that the screen line has been a problem. Then test the screen for bad dots, a machine with bad dots does feel unpleasant to look at. Then I will adjust the screen to all white, the brightness contrast to the maximum, back a few steps to see if the white screen has uneven brightness phenomenon, especially need to pay attention to the corners and the bottom / right side of the screen, because usually the lamp is installed in these two positions. Generally speaking the screen performance of a used machine is no longer as good as a brand new one, and the screen will be more or less yellowish, as long as you can live with that. If the screen appears to be off-color or appear color spots, etc., you should never buy, that is the screen itself or the screen line problem, and in some cases may also be a video card problem.
By now, I'm starting to trust JS a bit more, because the color, contrast, and brightness of the screen is perfect. Open the control panel, select the sound and audio device option, try to play the sound, and try to play this sound continuously, while repeatedly adjusting the volume size, feel in adjusting the volume when the sound playback is smooth, at the same time, listen carefully to the speakers there is no noise in the speakers, if the volume in there is still a lot of room to get to the maximum volume before the sound breaks, it means that the machine speaker has problems, may have been injured. Look for JS to ask for a pair of headphones and MIC, use a little, mainly to see whether the sound of the notebook external interface is normal, the normal situation of the headphone output sound should not appear murmur. If the sound is just too fast or too slow on the rhythm, it is generally sound card driver is not installed. Open WORD, enter a paragraph of content, make sure that the mouse and keyboard can be used normally and correctly enter the characters, a little patience to use all the keys on the keyboard, including key combinations to use, if you go back to find that the mouse and keyboard have problems, JS is likely to not recognize the account.
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The final battle - testing
Now, after the initial use of the machine, I feel very satisfied, and ready to use the other test software on the machine to test it properly. I don't need to tell you much about the next tests, the software is very easy to use, but be sure that if you find any problems during the tests, it's best to think more about whether you can change the machine.
After running the test software I brought, I asked JS to SUPER ∏ this program to run the machine, in accordance with the habit of using the desktop as long as you can run through the program, that basically proves that there is no problem with the host. Finally is the detection of hard disk tracks, the easiest way is to run ScanDisk to see, each partition should be detected, the purpose is to rule out the possibility of bad channels, if you see those shells have had traces of touch and fall of the machine to be especially careful. And then look at the purchase of the machine is not with a wireless network card and Bluetooth function. If there is a wireless card, be sure to figure out the type of card, and be sure to see the wireless card in the device manager under the network adapter hardware, some machines are just built-in wireless card antennas and switches, but there is no card inside the machine, don't be deceived by the JS, and if there is a card, open the light or in the right corner of the task bar has a connection indicator, these are the basis for judgment. These are the basis for judgment. I bought this machine because I needed to install my own wireless card, but JS was very honest and told me that there was no card.
Checking the machine can now basically end, and finally listen to the fan sound, if the fan is running with a sharp sound, it means that the fan bearings are worn out. If you don't hear any sound at all that means the fan is not rotating, restart the machine once, because the vast majority of laptops in the BIOS self-test should be incidental detection of the fan, the fan will turn for a few seconds, as long as it will turn on the problem. If there is no fan sound all the time, and make sure that the model of the machine you have chosen is air-cooled, then it indicates that there is a problem with the machine's fan.
Reaping the fruits of the battle