I have in my shop a HP dv7-1245dx laptop. It came in because it would not post. I get led light, but no splash screen. In troubleshooting, I have found that the lower memory slot when filled, will cause this problem. I have tried moving the memory cards from slot to slot both memory cards check good in the top slot and bad in the lower slot. I have tried three other motherboard with the same results. What am I missing? Is there a Bios to handle this problem, is there a hardware fix for this? I went to HP's web site and found no help. thought I'd give my friends here a crack at it. Thanks
Okay, I updated the Bios. I will have to get another CPU tomorrow to test this. I really don't know why the CPU. If the unit would power up in the upper and not with the lower memory slots filled. Then I've never had a problem with a CPU. Could be I guess.
I have had this issue with some gateway M series notebooks but never HP
If I was you I would pull it apart and run the board on a bench with just CPU, ram and LCD connected and see if you can get post.
Don't connect anything else.
Partner, that is exactly what I'm doing and have the same results. I'm not a big fan of the HP entertainment series. I think one of HP's biggest goofs yet. Any way, I'll update if I'm able to get anything going with this.
I have for some time told my customers that I thought HP had it going on. Now I'm not so sure.
I would check the capacitors on teh board.. I remember in 2002 I got a few IBM think centers in the shop with weird crashing issues and eventually would not post. An inspection of the board revealed that some of the capacitors on the board had leaked.
Core i7 930 @ 3.36Ghz
3x 2GB Corsair XMS3 1600Mhz
2x Radeon HD 5770 1GB in crossfire mode
OCZ ModXStream Pro 900W PSU
2x WD Caviar Black 1TB in Raid 0
1x 2TB WD Caviar Green (Data drive)
2x Dell 24in monitors
So no doubt man, it's a physical problem with the slot.
I have tried updating the BIOS, and the spacer for the memory slots. Tried a different mother board, and have same problem. I'm thinking CPU at this point. Have one on order. AMD sure makes it hard to order the correct part. I'm just beginning to learn how to read that mess on their CPUs. At any rate thanks for your input. I'll apss along what I find out, when I find out.
I would check the capacitors on the board.. I remember in 2002 I got a few IBM think centers in the shop with weird crashing issues and eventually would not post. An inspection of the board revealed that some of the capacitors on the board had leaked.
I not inclined to think it is capacitor related due to the fact the problem moved to another board. Of course, the new board could have the same issue, but what the chance of that? May be 1 to 1. I will pass along what I find out.
BTW: The memory in this unit is a stack style. If that makes any difference.
Tried a new CPU same thing. I'm beginning to think this is a manufacturing flaw and should have been addressed by HP. I well aware they have had a large problem with the DV entertainment series.
FYI: I had ordered what I thought was the correct CPU for this thing. It didn't work on more close inspection, I found it was not the correct CPU for this model. Long story short.... AMD numbering system SUCKS!
Would I be correct in assuming you've already examined under magnification the connector pins for shorts, cold joints, and improperly flowed joints (e.g. convex v. concave)? However, I'd also make sure to examine the memory interface/controller chip connections as well.
And of course inspecting for missing/wrong-value noise suppression components (resistors/capacitors) on the signal lines. I've seen production runs where the wrong parts were fed into the belt feeders and line diagnostics did not sufficiently deeply test the boards. The part error was found only when a line tech noticed the mis-loaded feeder after hundreds of boards had been populated.
Also, have you electrically tested for internal shorts across the connectors?
One might also consider applying a sharp point tool to each solder connection and deforming the solder a bit (e.g. putting a small "crater" in the connection). This has the potential effect of mechanically deforming any poorly flowed or cold-joint solder connection, and can result in temporarily "fixing" a problem...much like the guitar-pick "fix". Of course over time the "fix" will likely fail again due to on-going temperature and mechanical fluctuations. But...the point is it can reveal visually hidden poor connections and one can then focus on that aspect.
If HP had a manufacturing quality problem, it could have existed for some time before field reports came in and they addressed the problem. That could have led to a relatively long production run of marginal/failed units. Thousands of boards could be marginal and in the field.