Compaq with power issue

[emmanuelbill1988]

Please i have this Compaq presario CQ60,when my costumer brought it a caps was burnt on the board and after clearning and changing the spoilt capasitor i notice U47 ic was warming,i changed it and i have power on the board now but when i press the switch the laptop doesn't on,i made another check on the board and notices any ic on the board warms again,please can any one help me with the diagram of the board
Astrosphere MCP MB
07241-5
48.4J103.051
That is the board number,tnx in advance

[piernov]

Re: Compaq with power issue

Should be this one.

[emmanuelbill1988]

Re: Compaq with power issue

Please which page do you think i should check?

[emmanuelbill1988]

Re: Compaq with power issue

Please mine is CQ60,any one

[piernov]

Re: Compaq with power issue

MB is Wistron Astrosphere, should be ok. Check if 3.3V/5V is present and if you have 3.3V on power button. Check if PM_RSMRST#, PWRBTN#_MCP and PM_SLP_S5# gets high after pressing power button.

[emmanuelbill1988]

Re: Compaq with power issue

After making the checks am not getting 3.3v under switch and U56 becomes hot when i put in the charger but power jack Led shows on,please what maybe the cause of U56 becoming hot?tnx

[mielta]

Re: Compaq with power issue

Hi
Messure Pin8,16,17 from icU56

[emmanuelbill1988]

Re: Compaq with power issue

After measuring with charger plugged in i had
Pin8-3.2v
pin16-4.9v
Pin17-0v

[mielta]

Re: Compaq with power issue

messure Pin17 because a short to ground
also can U56 be defect

[emmanuelbill1988]

Re: Compaq with power issue

After taking measure again i got
Pin8/3.2v
Pin16/18.9v
Pin17/4.9v
Thats when i plug in the charger,is U56 defeat?

[wisnak]

Re: Compaq with power issue

I have the same motherboard CQ60 and the power jack led is on when i pluck the adapter and led 1 is on when i press the power button no led 3 and there no firther action and the the U48 start to be warm as usual and cpu fan not spinning, where i will start searching? any one has the boardview cause i cant finde som component like U47 or U56..?
than you in advance