The half-mold is the native motherboard line (24PIN) and the CPU power cable (4+4pin), also may have the video card (6PIN or 6+2pin) and the hard disk power supply line, the rest is only left the interface, to a root cuttings, do not need to plug in.Full touch is no native line, only the interface on the
HP notebook 4431s has been in use for two years, the fan sounds great, HP Support Assistant prompts "clear air outlet to reduce heat dissipation and fan noise"
View Official Website: Clear Air outlets to reduce heat dissipation and fan noise
Decide to clean the air outlet by yourself. The following are the steps for dismantling and cleaning.
1. Shu
Usbh_en (corresponding to gpg6) of is used to power the USB host, which needs to be controlled in BSP and can be used in init. the following code is used in the oeminit ()-> configuregpio () function of the C file:
// Ser gpg6 to output an usbh_en
S2440iop-> gpgcon = ~ (3
S2440iop-> gpgcon | = (1
S2440iop-> gpgup | = (1
S2440iop-> gpgdat | = (1
Use the above Code to enable the power
1. In the first step, shut down the computer and unplug the power cord.2. Now let's take apart the data center and remove the power supply. Note: unscrew the three screws of the fixed fan and unplug the power fan from the outs
PA6, PA7 usb_id usb_on all pull highUSB_ID: High voltage trigger external USB for chargingUSB_ON: Used to test the sub has been powered, plug the USB
Internal Charging Mode Analysis:The handle is plugged into an external power supply and the vbus level is high.At this point the usb_id level is high, open the Q11 Morse tube, enter the power chip pin 1,24v
BatteryPower Supply Module knowledge point
1. Notice on lithium battery charging curve;
2. Combined with code understanding, the state machine transformation process in the charging process;
3. What is the voltage of the low-voltage prompt;
4. What are the boot voltage and boot current respectively, and the V of the low-power shutdown voltage;
5. The full grid voltage is divided into several grids, and the
1, with a flat-head screwdriver or hand to open the CPU fan Four corners of the tightening fixed bolt;
2. Pull up the fan Four corners and tighten the bolt bolt;
3, and then unplug the fan and the motherboard power cord;
4, then you can
Q: My CPU fan sound has been very large, removed and found no exception. After the boot, the CPU, video card fan 5-6 seconds will not turn, and then the panel red light has been bright, green flashing, no alarm sound, long press power key can not shut down, only unplug the p
CPU core voltage By default is 1.475V, boot into the BIOS, check to see the CPU operating voltage of only 1.2V.
Due to the CPU's default operating voltage is 1.475V, now only 1.2V working voltage, so the computer often crashes the reason is certainly caused by insufficient CPU power
The actual CPU power consumption should be equal to = actual input of the CPU current (A) xcpu the actual voltage (V), which is the product of the supply voltage and current. The best way is to use sophisticated power tools to test.
In addition, the general calculation of a
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