Weak current College】 【CPU no core power supply testing ideas --- Power By】 【China power house network.

<br> <br> Fake load, CPU with diode stalls measurement point-to-core voltage and resistance <br> <br> "0" short-circuit ① ② filter capacitor diode reverse voltage breakdown breakdown ③ ④ pipe breakdown I / O .serious breakdown ⑤ South Bridge breakdown <br> <br> "1" circuit breaker replacement, clean CPU CPU block. <br> <br> There is resistance (Ω 478 plate ≥ 20) <br> <br> On the road and .down pipes properly measuring, measuring G-level on the tube to ground resistance <br> <br> "0" short circuit voltage IC breakdown <br> <br> "1" circuit breaker ① ② low resistance open-circuit voltage IC blank .welding ③ voltage IC adverse <br> <br> There is resistance <br> <br> Measurement voltage IC working conditions <br> <br> 1. power supply (12V, 5V look at the situation, you can go to find PDF .documents!) <br> <br> 2.VID line (must enable voltage IC believes we have a CPU load on the VID to! connected!) <br> <br> 3.SS pin voltage <br> <br> 4 .. peripheral feedback circuit <br> <br> 5.EN signal <br> <br> Voltage IC related working conditions many ~ specific can download the relevant PDF documents look closely related internal map ~ <br> <br> In addition most PDF .has an associated PIN defined description ~ you can have a look! <br> <br> Replace the voltage IC, IC output voltage of the external resistor SMD (basic knowledge to note that Ah, never down volume! 478 motherboard should pay special attention .to view voltage IC connected to 10 Ω low resistance is burned, 10 Ω becomes 30 Ω. replacement voltage IC perimeter of small triode <br> <br> ------------------ .--------------------< br> <br> CPU core power supply Department and upper tube D pole-to-ground resistance (may be) <br> <br .> This resistance is some empirical reference ~ for different form factor designs may have certain deviations ~ please flexibility! <br> <br> 370 pin CPU block <br> <br> D Pole on pipe ≥ 150 Ω (brand machine only 80 Ω .or so) on pipe ≥ 100 Ω G pole <br> <br> Down tube D very ≥ 100 Ω down pipe ≥ 100 Ω G pole <br> <br> 462-pin CPU block <br> <br> D Pole on .pipe ≥ 150 Ω on tube G very ≥ 400 Ω <br> <br> Down tube D very ≥ 20 Ω down tube G very ≥ 400 Ω <br> <br> CPU socket 478 <br> <br> D Pole on pipe .≥ 250 Ω on tube G very ≥ 400 Ω <br> <br> Down tube D very ≥ 20 Ω down tube G very ≥ 400 Ω <br> <br> 754-pin CPU block <br> <br> D Pole on .pipe ≥ 200 Ω on tube G very ≥ 300 Ω <br> <br> Down tube D very ≥ 15 Ω down tube G very ≥ 300 Ω <br> <br> 775-pin CPU block <br> <br> D Pole .on pipe ≥ 250 Ω on tube G very 300 Ω-500 Ω <br> <br> Down tube D very ≥ 15 Ω down tube G very 300 Ω-500 Ω <br> <br> 939-pin CPU block <br> .<br> D Pole on pipe ≥ 200 Ω on pipe ≥ 500 Ω G pole <br> <br> Down tube D very ≥ 30 Ω down tube G very ≥ 500 Ω <br> <br> Distinguish between the two measurement points: .<br> <br> 1) leave the load on the core power supply point <br> <br> 2) core powered inductively Department <br> <br> Normal circumstances these two points are connected, but if the saddle empty welding so .there is resistance inductor Department, but leave the load on the resistance to infinity! <br> <br> The above process is false load measurement on the core powered off load points of resistance! <br> <br> <br> <br .> <br> Security settings for the IP policy to be effective in deterring kill viruses <br> Win2000/XP/2003 systems, a Microsoft Management Console (MMC) on the system configuration capabilities into configuration module, greatly facilitate our special settings, we .can take advantage of this special setting, the number of crimes against computer viruses for blocking the door in the port. <br> <br> Action steps <br> <br> First click the "run" and enter "mmc", will .pop up after a carriage return "1" in the console window. We select the "file → add / remove snap-ins → in independent label column click on 'Add' → IP security policy management," and finally follow the prompts to complete .the operation. At this point, we have put the "IP security policies on local computer" (hereinafter referred to as "the IP security policy") to the "console root". <br> <br> Now double-click the " .IP security policy, "you can create a new management rules. Right-click IP security policies", "on the pop-up shortcut menu, select" create IP security policy ", open the IP Security Policy Wizard, click the" next → .name defaults to 'the new IP security policy' → next → do not have to select the 'activate the default response rule' "(Note: click on the" next, you need to confirm this point "Edit properties" is selected), .and then select the "complete →" new IP security policy properties → add → do not need to select 'use Add Wizard' ". <br> <br> In the address bar of the source address should select" any IP address ", .the destination address selection "my IP address" (do not have to select a mirror). In agreement with the label column, note the type should be set to TCP and IP protocol port from any port to the port 23, and finally click " .OK ". At this point in the" IP filter lists "in a" new IP screeningSelected for ", select it, switch to the" filter action "tab bar, tap" add → name defaults to 'the new filter action' → add .→ block → completed ". <br> <br> New policies need to be activated to work that:" the new IP security policy, "at right, the" assigned "have developed policies. <br> <br> Effect <br .> <br> Now, when we from another computer to Telnet to the fortification of the platform, the system will report a logon failure. Use the scan tool to scan the computer, you will find 23 port still in service. In the same way ., we can put the other any suspicious port blocking off. <br>.