Head damage of 5416

效率源技术部03

First, check whether NVRAM data is normal and whether PCB has been replaced. To know whether data structure of NVRAM is good or not, you can save NVRAM from a good drive and check it by Winhex. And the key to check whether PCB has been replaced is to identify serial number recorded in NVRAM (red character in the following picture) and compare it with the one recorded on lable.
' C6 r2 u1 A4 G4 OIn this case, data structure seems to be good and serial number is the same with that on label. So I suppose PCB hasn't been replaced. Here, you should notice why I suppose it not judge it. This is because some third-party may also change serial number recorded in NVRAM.
After that, I proceed to check whether firmware can be accessed or not. Enter menu of Read FW, double click a module, and check content of that module.
1 @2 h- e' w; XModule can't be accessed and also the client said no seek sound at power up, so I judge the possibility of head damage is higher.
! B. h8 S$ e) D* e
0 T8 V$ K# [1 D, Z+ ^) ?, E' |5 j

彭木姣

好贴，要顶呀!~~~~~~~~
我打酱油滴~~~~~
* d9 `% m0 w0 J4 v. r$ F
' |' c- R* A1 o6 N9 `+ V1 @1 E

贺至

很好不错  
9 C; r& f8 j6 xrl]