02-09-2010 09:44 PM
My R51 has recently started freakin' out. On the battery, (old but holds a fair charge) everything works fine. As soon as I plug in the wall power, it will randomly beep and flash the screen. It's as if the power cord is being plugged and unplugged. The battery icon will flash accordingly from battery to plug as well.
I've tried a new power cord and tested the battery. I noticed tonight that with the power plugged in, there is a high-pitched whine coming from the machine. It seems to be coming from the area around the power plug.
It will still charge the battery, but it's obviously only getting surges of power when it's flipping back and forth.
Has anybody ran into this before? Any ideas on what's going on? Would the LCD inverter affect the charging circuit like this?
02-10-2010 01:44 AM
It's likely that there's an intermittent contact somewhere between the wall and the mainboard
It could be anything from a faulty wall socket or plug, a broken wire in one of the leads, the charger on its way out, wear on the input plug or socket, even a board fault — the high-pitched whine suggests it may be in the computer.
Don't persevere with it — get it checked and rectified before it takes your machine out.
If you can locate one, try another charger, but anyway fix it before it fixes you!.
02-10-2010 11:25 PM
I've tried 2 different power supplies...same problem. I was thinking it might be the power interposer...but apparently that only applies to a 15" screen??? If that is true (anybody???) then I'm assuming I'm headed for a main board?
I'm open to other thoughts on what to look for!
02-13-2010 09:25 PM - edited 02-13-2010 09:26 PM
After a few hours on the cord only (no battery), it seems to be doing everything fine. No beeps, flickers or glitches!
I guess I've got either a bad battery or possibly a bad connector in the battery bay!
Thanks, Idle, for steering me towards the "no battery" test
02-18-2010 10:53 PM
Okay...as Marvin the Martian would say: "back to the old drawing board..."
After a good week of off-and-on use, now it's back to the flickering and beeping on the power cord only (no battery).
From what I've been able to read, a 14" machine regulates power via the main board? Any ideas? Anyone?
02-19-2010 02:26 AM
Okay, it looks as though something electronic might be on its way out — could possibly also be no more than a bad solder joint or a bad contact.
I'd be starting with the power input socket and checking that a firm contact is being made by all pins, then work on from there through the changeover control area.
Look for any sign of burning or corrosion, or a solder joint with a dark spot.
However, it's a section thats likely to be beyond the average user's area of expertise.
03-14-2010 09:40 PM
So, I noticed that the problem seemed to happen most when the cooling fan should have been running faster than normal. It wasn't. I took it out, cleaned it up, put the heat sink schmooey on it and re-installed. I haven't had a recurrance of the problem since!
Coincidental??? well, maybe. But, I guess the fan dragging was putting enough of a load on the power supply, that it was creating havok with the voltage regulation circuit.
It's crazy that something that silly can render a machine virtually useless...but, I guess that's the price we get to pay for high-tech gadgets!!!
03-17-2010 12:12 AM
install TPfancontrol (download it off the net) and then run Prime95 (another free download), and see whether this problem comes back.