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When we measured the condition of the CPU power supply tube, we found that the 12V voltage from the main board was pulled down to 0.6V after passing through a resistor, which is definitely wrong. The specific maintenance process is as follows:

HP TPN-C133notebookNon-startup maintenance “Machine model” HP TPN-C133 【 Fault phenomenon 】 There is standby current, which does not trigger. [Maintenance process] After receiving a machine that is not triggered by HP Light and Shadow Wizard TPN-C133, first remove the motherboard…

applenotebookA2141, the fault is that the fan can be turned on or off and not displayed. When the motherboard was removed and powered on, it was found that the current was set at more than 200 mA, and the fan was always turning. The voltage of each inductor of the motherboard was measured, and it was found that the GPU power supply did not come out. How to repair it next, and then read the following!

A MacBook pro A1708 is slow to boot into the system, which is very stuck. After testing, it is found that the current detection line is broken. Then how can you repair this problem? The following specific methods:

Apple A1932notebook20v does not generate voltage and does not start (short circuit at common point) [Fault model] Apple A1932 notebook 【 Fault Phenomenon 】 20v does not generate voltage and does not start. [Maintenance process] I received a machine sent…

GJ5CNXX is not turned on (s3 signal cannot be generated when the bridge is broken). [Fault model] GJ5CNXX [Fault phenomenon] No boot. [Maintenance process] I received a machine sent for repair by my peers, model GJ5CNXX, and the fault showed…