IndiaReFix - Laptop & TV Repair Forum

Hello friends,
Got one acer aspire 4738, it was not powering ON, I found both PCH(HM55) & Core PWM was short, after replacing both now display is coming, but its not detecting both HDD & ODD, i traced all voltages needed for HDD & 5V is coming, but Data signals missing, gain replaced PCH stiil same issue.
any other solution.

Jayaraj, why you not follow rules?
Please write all information:
1.Model from case
2.Board model/number
3.Describe problem clearly

Change bios, check sata clock frequency
Otherwise change southbridge IBM

Change bios, check sata clock frequency
Otherwise change southbridge IBM
Pch hm55

please upload motherboard pic and part no.

Jayaraj wrote:Hello friends,
Got one acer aspire 4738, it was not powering ON, I found both PCH(HM55) & Core PWM was short, after replacing both now display is coming, but its not detecting both HDD & ODD, i traced all voltages needed for HDD & 5V is coming, but Data signals missing, gain replaced PCH stiil same issue.
any other solution.

[ Post made via Android ]

I have uploaded photos
Model no : Acer aspire 4738
Board no : DA0ZQ9MB6C0
Problem : Not detecting HDD & ODD
Work done : Replaced PCH / Reflash BIOS / Checked +5V at HDD Connector present
There is no TX data signal coming from PCH to HDD

Pch new?

[ Post made via Android ]

I think first was with cleaner if no result
then check the around of pch if any resistance or capacitor missed or removed
I had such case
if not then Rework the pch

Domas wrote:Pch new?

[ Post made via Android ]

YES ITS NEW