ALIENWARE AREA 51M R1 NO POWER

2informaticos

Administrator
Staff member
No problem.
We already helped to solve some Alienware machines here.

Post the motherboard model first.
Is more easy to work with schematic in front.
 

kjchatman

Member
the model is la-g881p. someone attempted to replace the keyboard and after reassembling it, the board showed power briefly and then no power at all. It looks very clean with no burns of anything. I checked capacitors and I didn't find any with paths the ground on both sides. when the battery and the chargers are plugged in I get 3v and 5v on PL301 and PL302. 12 v is on the battery terminal. 16v is on PL111 and PL112. Will this board power up without the DGFF graphics card attached?
 
Last edited:

2informaticos

Administrator
Staff member
Check for drop pulse at PBTN_OUT# (at same time).
If detect it, check for pulse at PM_SLP_S4_R#.
If not, check if EC_RSMRST# is steady high.
 

kjchatman

Member
no 3v on pbtn_out#. the signal isn't pulled to ground either. there is 3v on pin 1 of rh2. EC_RMST# is 0v
 
Last edited:

2informaticos

Administrator
Staff member
So PBTN_OUT# is steady 0V?
It should be 3V and must drop to 0V at same time with ON/OFF#.

In this case, check VCIN1_AC_IN and LID_SW#.
Be sure to use the correct charger!
 

kjchatman

Member
pin 1 of DH1 is 3v. re70 is 3v on both sides. PBTN_OUT# doesn't react at all to pressing the power button. I don't have the dgff graphics card attached
 
Last edited:

2informaticos

Administrator
Staff member
Possibly EC ROM corruption.
I didn't see information about KB9542 yet.
May be programmed in some way like KB9x12, I hope; you should try.
The big problem is to find corresponding file...
 

2informaticos

Administrator
Staff member
PBTN_OUT# should react for sure, without graphics card.
Without its reaction, PCH will not start power on sequence.
At the moment, seems to have problems with KBC, which controls this signal.
 

2informaticos

Administrator
Staff member
KB9012/22 have dedicated pins for flashing.
These pins are fixed on the chip, but their place on keyboard connector differs, depending on board model.
Supposing KB9542 uses the same pins, find their distribution on the keyboard connector.
Then use Vertyanov, SVOD, or RT809H for programming.
 
Top