[操作疑難] Synology DS412+ 求修理

Last post is closed.

I tested with the daugther board. It does not have any short-circuit.  

Anyone knows how to check MOSFET on MB?

Last post is closed.

I tested with the daugther board. It does not have any short-circuit.  

Anyon ...
g2david 發表於 2014-12-17 14:43



    Why did you guess some MOSFET broken down?

TOP

點壞 著到機冇sin ?

TOP

Based on my limited knowledge, please correct me if I am wrong.

When I plug it in, the machine can start for one second, the 12V power supply light is flashing. There are possible causes: 1. short circuit. 2. Not enough power. 3. MOSFET short circuit.

I tried another DS412+ power supply. Same situation
I tested any short circuit using advices from another brother (sorry I forgot your ID).
Then the last possible is the MB power module.

If I unplug it, it can boot normally and I can log on to the Web page.

Any idea?

TOP

Based on my limited knowledge, please correct me if I am wrong.

When I plug it in, the machine can  ...
g2david 發表於 2014-12-18 09:47



直接EMAIL問佢地有冇得配塊子卡

TOP

回覆 5# chinwah


    $350.   值唔值得博下?

TOP

回覆 4# g2david

上次比左D圖你參考
http://www.hkepc.com/forum/viewt ... p;extra=&page=2
原來你還未解決問題

TOP

回覆 7# kchouse


    係呀, 我照住 check 12V , GND 無short circuit. 嘗試爆開火牛又失敗, 擾開了不半  .  借過friend 隻牛試過一樣. 佢唔方便拆開借塊試, 放左一排, 昨日記得又試過

TOP

本帖最後由 chinwah 於 2014-12-18 17:14 編輯

其實係唔係你有隻HDD 粒TVS Diode穿左呀?
有冇試過淨插子卡唔插HDD開機?

TOP

Based on my limited knowledge, please correct me if I am wrong.

When I plug it in, the machine can  ...
g2david 發表於 2014-12-18 09:47



   Yeah, it seems HDD power module faulty.  It is difficult to touble-shooting on short circuit problem. For me, I will find out lowest resistance point with using hp34401a meter. Then, de-soldering some components to confirm. Anyway, I suggest you to check short circuit point is on 12V or 5V circuit.

TOP